Why is this bothering me so much?

Last year I used and app to talk about my POCD and people called me a pedo and told me to kill myself. It has been months and I had even forgotten about it, but I talked about my mom yesterday and I feel a sense of doom now. Like, I could have lived my life normally, but this happened. I feel overhelmed, and don't know exactly what to do, cuz when I stop to think about it, it is something awful, but I spend months just not caring, I don't know what to do, it was not even close to the worst thing that has ever happened to me, but it still feels terrible, it keeps echoing in my mind, and It won't go away, and yes I know it is OCD, I just want to let It go. And I lied somethings to my mom cuz if I told the whole truth she would be even more heartbroken (I just didn't say what app it was and I said it was recently, and not months ago) And I feel bad, but now I can't go back, but if I told her the whole truth, she would've just broke down. Basically she thinks it was yesterday and in another app, and I told her I just commented on something. But I feel so bad! I don't want to tell the truth to her, but also, I don't know...

Everyday I wake up, all my mind makes me think of is the stuff I’ve done in the past, like all day I’m in a constant cycle of judging who I used to be and it hurts so so much. I wish I never thought to do those things, I wish I had been more mature than how I was before, it’s really lowering my self worth and I don’t think I’ve ever felt this miserable before, like last summer was the worst because I was dealing with this shit, I about almost ended my life over it, and I thought it would get better, which it did, but it didn’t last but for a while. As soon as it became 2025 I was going through it again, having constant cycles of “I’m a good person” to “I’m the worst person imaginable” and I’m so sick of it because I just want to feel like the good person l like to imagine myself to be, but I can’t because of shit I did in the past that I obsess over. I’ve cried and screamed so much over it and it seems like it will never leave me.

Does anyone deal with rumination with their childhood past mistakes. Deep down I know I didn’t know any better but then I start having thoughts and it gets worse after that. I also recently have dealt with death in the family, started my period, started college and just moved to my own apartment this last month. :-/ I genuinely just wish I could let go of my past I feel like I could be a better person for myself mentally if I could just let it go.