Why does this feel so real?

I don't know what's real. I don't know who I am, I don't know if everything I believe is made up, all my emotions, my memories..it feels fake, I'm stressed the fuck out because I can't even tell if my past is real

Lately, I have been able to manage my OCD thoughts kind of. They’re still there but I kind of push them away? I know that pushing them away doesn’t help but it’s been my only way to survive. I get scared often about things like clothes or my voice or how I present myself. I get scared that I want to dress differently or act differently and it scares me. I know for a fact I don’t want boobs or anything like that, but my mind constantly is like “What if?” and it kills me. It has ruined everything for me. Sometimes I can’t even look in the mirror because I get scared that I won’t like what I see. I’ve also been afraid because I find myself relating to many female characters, or I want to act like them. Like Pearl from Steven Universe. I want to be graceful and elegant like her, but I don’t want to be a girl you know? My mind constantly pushes these thoughts of what if and images. Because I am not like most guys. Which I know is okay. It just freaks me out. It makes me question every aspect of my being. I know who I am, but I know that the only way to move forward is to accept that maybe I don’t.. It’s just a lot.

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.