Does anyone ever have this thought of what if they did something and they start adding details to the story, it’s so terrifying and feels so real

I went to bed one night in November, and I can't quite say what happened, but I believed that I had a "memory" from childhood. I won't discuss what, but I had "remembered" doing something sickeningly awful. This thing came to me almost as clear as a real memory. I remember thinking something along the lines of 'How could I forget doing something like that?' followed by a feeling of complete horror and terror. I have moments of "clarity" where I can't believe that I'm questioning doing this thing, and it appears obvious that it's false. But now, I'm more than often believing that I did. I am spending 24/7 fighting my head, and it's taking me to dark places. I know this is the worst thing to do, but you don't understand, if this is real then I am a monster and I can't just adopt the 'maybe I did, maybe I didn't approach'. I just can't. I have to know. I'm so scared. My entire life is on the line. I don't have anyone to talk to about this. Literally no one. I feel like I'm insane, like I'm a monster, like I'm hiding my true identity from everyone I love. Does this sound like False Memory? Or am I in denial, trying to convince myself this didn't happen? Why does it feel so real? And why do I have moments of clarity? I also had my first nightmare about it last night. Please someone help me.

Does anyone imagine they are doing their harm thoughts during an action, making you feel like you acted on your thoughts? For example, someone gave me a hug and at the last second I imagined I was touching something I shouldn’t during the hug? I want to make it clear it’s something I have zero desire to do! But the problem is, I thought it on purpose and it makes me sick !! Obviously nothing happened but my mind is telling me that was me trying to do it. Even though it was physically impossible to do. Am I a monster or could this be OCD? I’m freaking out and don’t want to be here anymore. I feel like I’m the exception and that this isn’t OCD. I know I post about this stuff a lot but I’m struggling and don’t know what to do.

Does anyone else’s false memory intrusive thoughts of what could have happened feel very, very real?