I am a 22 year old female. Started a few years ago with some trouble breathing...told I had asthma. About a year ago it got worse. The past couple of months, more so. I now experience a pounding heart beat sometimes when I eat, through exertion (something as simple as making up a bed), when watching TV, etc. It doesn t happen every time, and can happen for no reason. I also experience a rapid heart rate, frequent shortness of breath, and constant fatigue. I have been to many different doctors, had many tests, and it is so frustrating...especially when I am told that they can t really find anything wrong.