What caused these thoughts

I have pocd and am dealing with a real event situation with it. I did something really really odd when I was 18, like really weird. It kinda involved a child but no one was hurt and nothing s*xual really happened. What I did tho was really weird and although I’m kinder to myself and not calling myself a p*do anymore I still can’t shake how weird what I did was. Im not talking something cute and quirky weird like im talking weird weird and strange like mentally not with it. I feel like I’ve ruined everything and base my life on this thing I did. How do I stop feeling like this when I feel like I deserve to be put in an asylum.

So I’m 15 and I first realized I had ocd when I was 13. It started with a bad dream I had that triggered intrusive thoughts. The theme of these thoughts were almost purely sexual. It started as Iocd, and that turned into compulsions of not letting family touch me at all and cleaning myself with alcohol and hydrogen peroxide to get rid of “family germs” because in my mind that meant I was a bad person if I so much as even touched an object that they touched, I just started getting over it recently and I’m feeling a lot better, but the other day another theme was triggered after I heard about this guy called “smartschoolboy” and he disgusts me so much. He’s disgusting. After I heard about him it started triggering intrusive thoughts. I was sobbing over the pocd thoughts the other day, and my brain won’t stop trying to convince me that I am one. No matter what. Today it was “why aren’t you crying about these intrusive thoughts like you were the other day, that must mean you think it’s okay to be one” and it just hurts so much to have these thoughts, I can’t live in peace and I was literally fine just a week or two ago, how do I get rid of this, I just want to be happy again (sorry not to sound dramatic I’m just really scared right now) I mean deep down I know I’m not one every time I hear about one I feel disgusted, I hate even thinking about the fact that those type of people exist, but whenever I tell myself that my brain gets to convince me otherwise. My thoughts have always (mostly) been sexually themed but these are the most disturbing ones I’ve had and I’m so scared right now, anything helps please 🙏🏻

Okay, so I was exposed to porn at 9. My older cousin came over to the house and asked if I could keep a secret and stuff and then he showed me porn. I got addicted to it ngl. I would watch it whenever I could and would always think about it when I wasn’t home. Because of this, I started reading mangas on this one website and I was still in elementary school when I started reading these I think, either that or middle school. Anyways, there was this one about these kids who did it and I was like oh I’m the same age as them and all that you know so I didn’t think much of it. I would still read it up to when I was in high school but I wouldn’t like read it often, I would just read it because I was familiar with it and it felt like I was still their age for some reason, like I didn’t see them as kids you know, it felt like they were my age. Oh my god, that makes it sound even worse. When my POCD started, I stopped reading that story because I was it terrified me so a little before I turned 18. I keep going back and forth on whether or not I’m actually a pedophile or not. I don’t know if it’s because I was exposed to that stuff so early and my cousin would constantly talk about sex when he was with me. I thought it was so normal to be reading and looking at that stuff. I didn’t realize. I’m scared that my nephews are going to be exposed to that so early like I was. My POCD mostly targets my nephews and now I’m scared that I’ll do the same thing to them and show them that stuff (I never will) or that I genuinely do like that stuff. I feel like throwing up while writing this. I just don’t want to be one. I’m sorry if this triggers you or if this seems like I’m seeking reassurance and maybe I am. I genuinely don’t know right now. I think I just needed to get this off my chest because I’ve been worrying about it for awhile.