What age did your symptoms start

I’m asking this question because I have had OCD symptoms for as long as I can remember. I’m now 22 and I’m starting exposure therapy for this issue. When I was in kindergarten I had this obsession that people could see what I was thinking (literally, like it was a thought bubble above my head) and that they would think I was a bad person. I would stare in the mirror to see if I could see the thought bubble, but I assumed that I wouldn’t be able to see my own. Then I would have intrusive thoughts playing in my head that I believed everyone around me could see but I couldn’t see their thoughts. I would wash my hands multiple times up to my elbows trying to wash away the thoughts, often in the school bathroom. I would get yelled at by my teachers for trying to “take a bath in the sink”. I knew my thoughts were abnormal compared to other children, but did not talk to anyone because I thought something was wrong with me. This is one of the earliest memories I have, and I’m wondering if others experienced similar symptoms at a young age or if it developed later for you. Some other things I noticed were that I would have to take the same amount of steps per square in the sidewalk and it would always have to start with the same foot at the beginning of a new square, I also did this with the tiles at my elementary school and always had to put one foot per tile, but would get yelled at by my teachers for it, and I would want to cry because I wasn’t doing it correctly. This was all staring in kindergarten, but my symptoms really worsened when I was 19 after both of my parents passed. Like I said though, starting exposure therapy. I’m just wondering if others have had these symptoms as long as they can remember.