I went through a period last fall during which I got it into my head that I wasn't really bipolar, I'd merely been going through an existential crisis over the past few years and was finally snapping out of it. Naturally, pride goeth before a fall, and that feeling was merely the beginning of a wild manic episode that was quickly followed by a crash. That convinced me once and for all that my diagnosis was indeed correct, and as embarrassing as it was, I'm sort of glad it happened. I really did need that reality check.