I diagnosed myself in 2011, after 6 weeks of out patient group therapy at the hospital. It was from 9 to 3, 5 days a week, and the 2nd time I'd done the group therapy. I wasn't diagnosed by a pdoc until August 2013. I finally got the correct psych meds in July, 2017, after being diagnosed BP2 by a new psychiatrist. I'm still working on finding the best drug cocktail, but I'm so much better than before.
So I diagnosed myself in 2011, and was diagnosed BP2 by psychiatrists twice after that.