I think I've probably been BP for most, if not all my life. I never slept, even as a baby, and I had night terrors from about ages 6 to 11. Had my first depressive episodes at 10 and 13; I think mania showed up in my early to mid 20s. However, I wasn't diagnosed till I was 53, and to my surprise I ended up being diagnosed bipolar 1 at 55. So it took a long time for the disorder to develop in me.