Thanks Claire, I was wondering the same thing for myself. The doctor I had, tried to find out what was going on but admitted that he didn't know much about pots. All the tests I have had I was on meds. so don't know if they were right. The doctor did say he thought it was pots, but said it could be hard to diagnose?? The only test I had done that showed anything was the holter moniter. My heart rate would be 132 for hours then all of a sudden go back to normal. The diary that I kept showed this wile I was standing. Other tests I had I had to stop because of near fainting, and my blood pressure going too low. (I origanally went to the doctor because everytime I would exersize I would become weak and dizzy. Even takeing care of my small children could bring a dizzy spell on.) I started haveing these symptomes while pregnant with my youngest and thought it was the pregnancy. Then after I had him I thought it was because I breast fed him. 14 months later I stopped breast feeding him and I was still weak all the time. Sorry I keep jumping around, I'm having a bad day and my mind is wondering. Anyway, I have seen two doctors who have said it was pots but never helped me understand what it means for me. The info I have I got from my Pharm. (she refused to fill a persciption for safety reasons) She was curious herself and got the info. for me. Now I'm playing a waiting game with insurance and then I might have a problem with pre-exsiting stuff. I also don't know of any doctors in Arizona who will be able to help me when I do get insurance. I can't afford to travel far and I'm worried that I may never know what is "wrong" with me. Do you know how stupid I feel telling someone if they ask, there not sure what's wrong but don't worry, the worst that could happen is that I could pass out. Thanks for listening, Amber.