Responding to the OP's question if you ever question your diagnosis, yes, I do. (Bipolar Type 1.) I think about it regularly. I was diagnosed in the mid-90s and have seen many different doctors over the years. None have ever come to a different diagnosis, at least that they have told me about. Yet sometimes I think my depression is situational, like if I changed my life in some ways, it would cure things. (But it's easier said than done.) And as for mania and hypomania, is it really a brain disorder or do I just get really excited about life for periods of time? Does healthy eating and exercise, when I get all that together, just make me happier and give me tons of energy? I don't know. I do clearly have mood problems, but sometimes I wonder if the whole concept of "bipolar" is really an accurate description of what is going on.