I wonder sometimes, because a lot of my symptoms seem sometimes different from other people in the bipolar forum. The things I struggle with most are anxiety and obsessive thoughts. But they come and go in cycles. I've determined the anxiety/obsessive thoughts are my "depressive" episodes and my hypomania, well, that's a little more clear.

I know that bipolar meds help me a lot, so that must mean I have bipolar disorder. Also, I know that I'm not a typical person with OCD, because SSRIs (antidepressants) often make me hypomanic so I can't take them unless I'm severely depressed.

Maybe if you write down the reasons you KNOW you are bipolar, that will help you next time you question it? Post it on the fridge, maybe?