How do you know if you are suffrering from panic attacks?

Sudden Onset: The happen without warning & last no more than 30 minutes. Symptoms may be respiratory, gastrointestinal, chest pain, or feelings of unreality. Although it may feel like something is wrong physically, medical evaluation reveals no active medical problem. Make sure to see your physician about this soon.

Genuine Panic Attack: In psychiatry we define a panic attack as a period of intense fear or apprehension that is of sudden onset and short duration. Patients might experience shaking, shortness of breath, chest pain, sweating, nausea, and/or a sense of impending doom. When used in the context of panic disorder, a panic attack happens without cause. The idea that something can happen without cause can be upsetting.