When Doctors make a diagnosis, they really don't know what you have. What they do is try you on a few drugs, and when one works, they say "oh, so that's what you had."
Try to find a cousellor. It can be just as effective as drugs, it can even change your brain chemistry. It also increases the effectiveness of drugs you are already on.
Lifestyle changes, like exercise, changing stress levels and changing sexual patterns can do the same thing.
Use a buckshot approach, and try all three angles.
Good luck, man. Bi-polar runs throughout my family, it's fvcking nasty.