Sorry to hear all you are going through. It's got to be tough at such a young age. While you are waiting for the next specialist to try and figure out what is affecting you, you might start learning about how pain actually works. This might give you a little self control over your symptoms. Check out Bboyscience.com under Articles look for Pain Education - lot's of good stuff that is easy to understand; knowpain.co.uk is another informative site. There has been a focus on pain in the physical therapy community over the past 15-20yrs and how the discomfort you feel may not necessarily be due to any damage in your body. Hard to believe, but learning about how pain really works will help answer many questions regarding why you feel the way you do. I hope you find some reassurance and hope. Good luck.