it took them ages to get mine right too. when i was about 15/16 the gp gave me antidepressants that sent me sky high manic, and made me realy violent and she said "it may be manic depression but she's only a teenager so it's more likely to be teenage angst" - no further action was taken. at 23 i was properly diagnosed and it was a relief, in a way, because i'd been having depression treatment for almost 10 years that was just making me iller. i just realy think that doc has a lot to answer for - surely if there's any chance of it being bipolar, you get it looked at and don't just dismiss it as "teenage angst"? angst as a teen is about boys and spots, not about trying to kill people :S

i hope now you have a more clear dx, that the meds and the support make a positive difference for you x