When you first post it would be a good idea to post that you indeed saw a doctor, that tests have been done, what kind of tests have been done, what other tests are you still waiting for? Even a doctor on this forum could not give you a diagnosis without seing you, running tests on you, and checking you out.
What did your doctor tell you so far he/she thinks could be wrong with you? Are you asking him/her any questions?
What tests have you had? What results do you have, so far?