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.
Have you ever worried about your health? Money? The well-being of your family? Who hasn’t, right? These are common issues we all deal with and worry about from time to time. However, if you find yourself in constant worry over anything and everything in your life, even when there should be no cause for concern, you might be suffering from Generalized Anxiety Disorder. People with this condition often recognize they are “over-worrying” about a lot of issues, but have no control over the worry and associated anxiety. It is constant and can interfere with your ability to relax or sleep well and can cause you to startle easily.
A phobia is an unrealistic or exaggerated fear of a specific object, activity, or situation that in reality presents little to no danger. Common phobias include fear of animals (such as snakes and spiders), fear of flying, and fear of heights. In the case of a severe phobia, you might go to extreme lengths to avoid the thing you fear. Unfortunately, avoidance only strengthens the phobia.
If I might make a suggestion for another coping mechanism: go near someone you trust – a friend, family member, or spouse. There’s safety in numbers, and even your subconscious knows that. Being near someone you trust can be comforting, as you’ll be able to get their help if something really does happen. It doesn’t matter if you talk to them, if they’re paying attention to you, or even if they’re sleeping – them simply being nearby and available to call upon if something happens will dull your fear.
People with panic disorder often worry about when the next attack will happen and actively try to prevent future attacks by avoiding places, situations, or behaviors they associate with panic attacks. Worry about panic attacks, and the effort spent trying to avoid attacks, cause significant problems in various areas of the person’s life, including the development of agoraphobia (see below).