When did you first realize you had OCD?

Just curious to see what people’s first experiences where if you can pinpoint it and remember? Mine was in middle school when I was so scared to contract AIDS that I wouldn’t eat things that were red because it reminded me of blood. I wouldn’t eat off of silverware that was not from the house or I would have to wash it myself before eating off of something in public, I would read hours of research papers and looking into communities I could join if I was sick, etc. This lasted years for me. I didn’t realize I had OCD at first and I didn’t tell anyone for a while because I thought people would think I was crazy even though my brain couldn’t get out of the loop. I no longer have this obsession but my OCD will manifest itself in other ways outside of contamination. Seems like it just depends on what’s going on in my life and how stressed I am.