Never been diagnosed, but I definitely suspect it. I show a lot of the classic signs, just not quite as severe as people I’ve known that were diagnosed. I started drinking coffee when I was a kid, though, so I tend to joke that I have been inadvertently treating myself for ADHD all this time :)
You should go get screened! I just finally got diagnosed at age 38, and it's shed so much insight into my life. Plus, medication can really make a real difference.