Hello everyone. I've been lurking for a while and thought it was time to say thank you to everyone on this forum. I think that I may have had a mild version of POTS for years, but when I got short of breath going DOWN stairs, I couldn't just pass it off as needing more exercise, better diet, etc. After a round of tests showed that my "plumbing" was OK, my ex-doctor tells me that everything is fine, and I'll never know what causes the symptoms, and stop wasting the insurance company's money. I tried telling her that just because the plumbing works, it doesn't mean that the control systems do, but she wasn't interested in anything I had to say. I do have to thank her though, she got me mad enough to do my own research. Thank you a million times for this site. I stumbled into it somehow & found out what my problem was. I also found a doctor that is helping me through this site.