When I was first dx'ed bp at 18 I laughed in the doctor's face because I didn't believe it. I was never happy, therefore could not have bipolar. I didn't know about mixed states at the time and didn't realize I had them frequently. In fact I went right on denying it for the next six years. It wasn't until I had my first euphoric mania that I finally believed it. But when I'm unstable I spend 90% of my time depressed or mixed, with only three or four days of euphoria at a time.