I had one day of hypomania symptoms (felt like I was crawling out of my skin, couldn't focus on anything, hyper, etc.) and I thought I was going down the rabbit hole after 2 years of remission. But then -poof!- it went away. I got a bit of a cold and thought it was that, but the cold turned out to be really mild. I wish I knew why it happened because I really don't think it was BP-related; it would have lasted a lot longer. Scared the bejeesus out of me, though!