It hit at fifteen. My whole personality changed. Misdiagnosed as depression, and given antidepressants for years that caused mania. Stupid pdocs back then never considered BP, just a moody teenager. Came off the meds around 19-20. I was sick of being a guinnea pig. Then literally a few months before my wedding at age 26 the **** hit the fan. I look back at the years in between and I guess I was just managing it. I was then diagnosed at 28 finally. It's so hard to know what's what because I've suffered from OCD my whole life, and I really was consumed by that at 16. So a lot was going on at the same time when the BP started.