Is it possible to have had SOOCD even when you were a child?

Anyone who has had sexual orientation OCD since the “dating age” (middle school/high school)— how did you ever determine your sexuality? I don’t want reassurance because I understand our experiences may be different. I’m just curious— did you try boys and girls? Did you just find your person and know? I started having SOOCD at age 16 and I’m now 28. OCD has ruined my ability to date more than anything else. I feel like it stole my chance at love. I’ve had three long-term situationships with men. I adored them but they were also toxic because I think I subconsciously didn’t believe I deserved better. I felt that if I knew the relationship wouldn’t work because of fundamental differences, at least it was okay that I couldn’t fully be present in the relationship. Not sure if this makes sense, but I’m just grieving that part of my life I missed out on.

I never read someone talk about this so I wanted to know if it applies to anyone as well. For context: I deal with ROCD and SOCD but I do identify as straight and am in a (happy) relationship with a man. What often triggers me is memories about childhood and adolescences about having the groinal toward nudity in porn or music videos. Because I can’t deny having watched other things than straight porn and experimenting with porn I simply can’t stop trying to figure out what that might have meant and if i deep down have actually a other sexual orientation than the one that I feel comfortable identifying with. I only hear people talking about random triggers but never the REAL memory of arousal to pornography and so on.

Since when do you believe you have OCD? Anyone who would like to share what were the indications/symptoms in childhood?