Keep talking with your doctor. Once things settle, maybe you can try reducing or changing some of the nasties...
I think its really important to have a decent period of "normal" time to let your brain readjust to normal moods before you try to remove things... also as Shakti suggested, antidepressants only - bad news!!!
Manias drive depressions, so getting rid of the manias is the best way to avoid nasty depressions...