The cause of anxiety disorders is a combination of genetic and environmental factors.[47] Anxiety can stem itself from certain factors: genetics, medicinal side-effects, shortness of oxygen.[48] Risk factors include a history of child abuse, family history of mental disorders, and poverty. Anxiety disorders often occur with other mental disorders, particularly major depressive disorder, personality disorder, and substance use disorder.[49] To be diagnosed symptoms typically need to be present at least six months, be more than would be expected for the situation, and decrease functioning.[10][49] Other problems that may result in similar symptoms including hyperthyroidism, heart disease, caffeine, alcohol, or cannabis use, and withdrawal from certain drugs, among others.[49][7]
One of the most important things you can do is to listen to your family member or friend talk about the things in his/her life that are sources of stress. A first instinct might be to offer advice or ideas for a "quick fix". However, simply accepting your friend's stress levels can help them deal with their anxiety, knowing that they can rely on you as a source of support even when their symptoms might be tough to watch. Studies show that social support from family and friends can be one of the strongest protective factors against debilitating levels of anxiety.
Women are more than two times as likely as men to be diagnosed with an anxiety disorder. (6) It’s not clear why this is the case, but researchers have theorized that it may be due to a combination of social and biological factors. Scientists are still investigating the complex role that sex plays in brain chemistry, but some research suggests that in women, the amygdala, which is the part of the brain responsible for processing potential threats, may be more sensitive to negative stimuli and may hold on to the memory of it longer. (7) 

I started crying and could barley breathe then i started getting butterflies in my stomach I had a bad headache and I felt weak and shaky I haven’t been diagnosed with anything because I don’t tell people about it only my really close friend…anytime something goes wrong I feel like I’m going to cry maybe I’m just an emotional person but idk any suggestions?
Vertigo is the sensation of spinning or rocking, even when someone is at rest. Vertigo may be caused by a problem in the brain or spinal cord or a problem within in the inner ear. Head injuries, certain medications, and female gender are associated with a higher risk of vertigo. Medical history, a physical exam, and sometimes an MRI or CT scan are required to diagnose vertigo. The treatment of vertigo may include:

Have you ever experienced an intense feeling of terror, fear or apprehension, for no apparent reason? If you have, you may have experienced a panic attack. If you experience recurrent panic attacks, you may have a condition called panic disorder. Panic attacks can also be the sign of other underlying medical or mental health conditions, including sleep disorders, post-traumatic stress disorder (PTSD), or depression.
Cognitive Behavioral Therapy (CBT) is an example of one type of psychotherapy that can help people with anxiety disorders. It teaches people different ways of thinking, behaving, and reacting to anxiety-producing and fearful objects and situations. CBT can also help people learn and practice social skills, which is vital for treating social anxiety disorder.