ocd compulsion at 10 y/o- actually cocsa?

I am really worried that I may have SA'ed my little sister. When we were very young, and I mean, really, really young, I was 5 I think. I used to kiss my sister, because I was curious and my mom caught us and she told me not to do it again and I didn't. But when I was about 11 she felt on my lap and I liked the sensation so I tried to rub myself against her. I tried to take my life because of this, I did therapy and everyone, including my sister, told me that I was just a child, and my sister admitted to having done similar things and she said "Would you blame me?" and I said no because she was a child and barely understood what was happening. My therapist said that I mimicked adult behaviors when I kissed her but she was so young, like barely 4 years old and I feel sick to my stomach and I just want to die.

I’m really struggling with something related to me ocd, and I would appreciate kind and supportive advice. If you can’t relate or don’t think anything you have to say would be helpful, I kindly ask pls refrain from commenting this is a really sensitive topic for me. Recently, I’ve noticed a pattern that feels something extremely new and distressing. The first time it happened I remember telling myself before self pleasuring that I am in control no matter what thought comes into my mind because I wanted to prove to myself that these thoughts are just from OCD and I know who I am and an intrusive that came out of no where, and i suddenly felt an intense fear that I was acting on it. In the moment I genuinely felt like I did. And afterword, I panicked and started questioning myself. This SAME FEELING has happened three times in a row each time, the intrusive thought was unwanted and random, and completely against my morals most recently it involved pocd and it feels even worse because it generally felt like I acted on it the thought in the moment while I was self pleasuring the panic doesn’t hit until afterwards when I stop :/ I start thinking that maybe I generally made a mistake and I’m now just realizing that it’s wrong because it generally feels like that :( but when I actually think about it again goes against my morals and values doesn’t make sense it feels incredibly real, and I can’t seem to shake this feeling off that I may have acted on it I’m terrified because I never wanted these thoughts in the first place. And I definitely didn’t choose them. If I had known, I would’ve had these intrusive thoughts I wouldn’t have self pleasured in the first place but it’s extremely hard to convince myself that this may be OCD because I feel like I have no other reason to believe that I didn’t act on it :/

I’ve been feeling the urge to avoid intimacy or purposefully engage (for reassurance that I won’t give into a compulsion) because of intrusive thoughts and fear that I’ll “check/test” my reactions. My OCD is making me so scared that I’ll purposefully think of a child and try to see if I like it. It’s so complicated but I guess I’m mentally checking if I would mentally check during intimacy. I’ve even envisioned myself checking and it’s making me so nauseous. I know it’s a compulsion like any other but the sound of “touching yourself to the thought of a child” sounds atrocious and vile. I’m terrified I’ll automatically start checking next time I am being intimate. I truly feel so worried. If anyone has gone through something similar, I’d appreciate hearing your experience. Or if anyone has any advice?