What's the earliest sign you had OCD?

So I thought this would be an interesting topic and I'm curious how others recognise OCD in their lives looking back.

I'll go first.

For me my mother would always say don't talk to strangers and don't leave things in the hallway in case of a fire. This made me incredibly anxious. I would literally speak to no strangers even in school I was scared to talk to the teachers because of this. I would get anxious and move things from the hallway in case of a fire, to the point the hallway had to be free from items. I can only describe it as having my mother's voice in my head scaring me all the time. What she said swirling around the back of my mind perpetually.

You?