I wasn't diagnosed until age 43. My T said you have Bipolar I. Literally my life flashed before my eyes and everything made sense. Honestly I was relieved.. Through our years of work we traced mine back to about age 6.

My daughter was diagnosed Bipolar I 3 months after I got my shiny new badge ( lol) She also had no problems accepting it. She recently had her Bipolar switch to a II as she never went manic, Hypo yes. But she was also diagnosed ADHD and that also helped her to understand herself.