Carbonell says that understanding the physiology of fainting and reminding yourself of it is important. People faint when their blood pressure drops. A anxiety attack can make you feel like you’re going to faint, but you won’t because your blood pressure doesn't drop during an attack. Remind yourself out loud of truths like these to counter your fears.
In a decision context, unpredictability or uncertainty may trigger emotional responses in anxious individuals that systematically alter decision-making.[46] There are primarily two forms of this anxiety type. The first form refers to a choice in which there are multiple potential outcomes with known or calculable probabilities. The second form refers to the uncertainty and ambiguity related to a decision context in which there are multiple possible outcomes with unknown probabilities.[46]

Some research suggests that people who have panic disorder might be very sensitive to sensory experiences (such as sunlight, smells and changes in the weather), but there's not enough evidence yet to say for sure. Also it's not clear whether having a high level of sensitivity to these sorts of things is something that might cause you to develop panic disorder, or whether it may be an effect of having it.

There remains a chance of panic symptoms becoming triggered or being made worse due to increased respiration rate that occurs during aerobic exercise. This increased respiration rate can lead to hyperventilation and hyperventilation syndrome, which mimics symptoms of a heart attack, thus inducing a panic attack.[42] Benefits of incorporating an exercise regimen have shown best results when paced accordingly.[43]
An estimated one in five working age adults lives with a mental health condition, yet more than 60 percent do not receive treatment. When employees do receive effective treatment for mental illnesses, it also leads to increased productivity, lower absenteeism, and decreased disability costs. Many companies are increasingly providing resources and programs to support employee mental health and well-being. So how do employees think their employers are doing with these efforts? That is the question addressed in a recent national survey of employees conducted by the Harris Poll for the American Heart Association.*

Don’t panic. That’s a phrase we hear countless times in a day. We hear it in conversation, on TV, in the movies. We say it to ourselves. Why? Because when we panic– experience an intense sensation of fear or anxiety in response to an actual danger—we are more likely to lose control and react to potentially unsafe even life-threatening events in a frantic or irrational way. Panic inhibits our ability to reason clearly or logically. Think about the explosion of fear, the borderline hysteria you felt the day you momentarily lost sight of your six-year-old in the mall. Or the time your car skidded violently on a rain-soaked road. Even before you registered what was happening, your body released adrenaline, cortisol and other hormones that signal danger. Those hormones cause physical reactions: heart pounding, shallow breathing, sweating and shivering, shaking, and other unpleasant physical sensations.

People often fear the worst when they're having an anxiety attack. Most of the time, there’s no underlying physical problem, such as a real heart attack. But you should get the medical all clear if you have repeat anxiety attacks, just to be sure you don’t need additional treatment. Then find a cognitive behavioral therapist with experience treating anxiety to help you through.
Funnily enough that was my first reaction to calm myself down. I was in my room when it happened, and when I was in control enough I crouched down and just stared at a part of my carpet. I wasn’t paying attention to anything in particular, I was just “seeing”. And you just let the image of what you’re looking at fill your mind, just observe the shapes, colors, you look around that image without moving your eyes. It rly worked for me. But I’m still not sure if what I had was a panic attack, bc I’ve never had one before. I didn’t have too much fear because I knew what started the emotions and that I wasn’t in danger, they were just extremely exaggerated and sudden. I mostly had a rapid heart beat, shortness of breath, feeling a loss of coutrol and need to cry/shout, but no shaking,dizziness or chest pain. Also it just lasted 4-5 mins so I don’t know?
Panic attacks (or anxiety attacks - the terms are interchangeable) are intense episodes of fear which are so powerful that they trick you into fearing that you are dying, going crazy, about to faint, or losing control of yourself in some vital way. The symptoms of a panic attack feel so powerful and threatening that they convince you that you're in terrible danger.
If you’re experiencing a lot of physical anxiety symptoms, you should start by getting a medical checkup. Your doctor can check to make sure that your anxiety isn’t caused by a medical condition, such as a thyroid problem, hypoglycemia, or asthma. Since certain drugs and supplements can cause anxiety, your doctor will also want to know about any prescriptions, over-the-counter medications, herbal remedies, and recreational drugs you’re taking.
Many factors are linked to the development of panic attacks and panic disorder. In terms of personality, those who are more prone to anxiety, and more likely to believe that anxiety is harmful, are more likely to experience panic attacks. Stressors and interpersonal issues, such as a death in the family or adverse life events, tend to be seen in the months preceding a panic attack.
Agoraphobia is often comorbid with panic disorder — meaning people often suffer from both conditions at the same time. It's an intense fear of not being able to escape whatever place you're in, and can often lead to an avoidance of leaving the house. People with agoraphobia can fear situations where this anxiety might flare up, and typically don't feel comfortable or safe in public, crowded places. 
When taking medications, it is important for clients to be educated about potential side effects, the rationale for the type of medication prescribed, and other drugs or substances that may counteract or interact with the effects of the medications. Before stopping taking the prescribed drug, or if the medication does not seem to alleviate symptoms, the doctor should be consulted.
Genetics and family history (e.g., parental anxiety) may predispose an individual for an increased risk of an anxiety disorder, but generally external stimuli will trigger its onset or exacerbation.[57] Genetic differences account for about 43% of variance in panic disorder and 28% in generalized anxiety disorder.[58] Although single genes are neither necessary nor sufficient for anxiety by themselves, several gene polymorphisms have been found to correlate with anxiety: PLXNA2, SERT, CRH, COMT and BDNF.[59][60][61] Several of these genes influence neurotransmitters (such as serotonin and norepinephrine) and hormones (such as cortisol) which are implicated in anxiety. The epigenetic signature of at least one of these genes BDNF has also been associated with anxiety and specific patterns of neural activity.[62]

There are dozens of drugs that can be prescribed to treat anxiety. Since each person responds to medication differently, there's no one drug that works perfectly for everyone. You may have to work a little with a psychiatrist to find the right medication, or the right combination of medicines, that’s most beneficial to you. The drugs that are used to treat anxiety over a long period of time are antidepressants, which affect serotonin, norepinephrine, and other neurotransmitters in the brain.
Although beta-blockers are most often used to treat high blood pressure, they can also be used to help relieve the physical symptoms of anxiety, such as rapid heartbeat, shaking, trembling, and blushing. These medications, when taken for a short period of time, can help people keep physical symptoms under control. They can also be used “as needed” to reduce acute anxiety, including as a preventive intervention for some predictable forms of performance anxieties.