For those of use that found out we were autistic as adults, how did you find out? What caused you to consider that you were autistic? What confirmed it?

I met several autistic folk over my life and each and every one of them suggested I might be autistic. Then my nephew got diagnosed with autism. Then my mom started thinking back on all the social and emotional issues that were brushed off by medical people when I was a child. Then I got an in depth psychological evaluation, and surprise surprise! Autism. Explained a lot...