False memory and evidence

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.

Hi all, I’m really grateful for all the support I’ve gotten from people in the last few days. My mental health is at an all time low and I really appreciate the relief people have brought. I had a question about whether an intrusive image of a potentially imagined event can feel just as real as a real memory. I’m doing my best to stop ruminating over an image I have in my head, and have gone so far as requested security footage of myself and have been told both through that and by my friends that nothing bad happened, but the image in my head feels just as real as other memories. I was also drinking the night in question, which makes it harder for me to dismiss the image and makes me feel like I shouldn’t. I was just wondering if imagined images can feel just as real? I’m trying to use tools to ignore the image, and have therapy scheduled for tomorrow, but I feel like I can’t responsibly dismiss the image even with the evidence I’ve gathered if there’s something about a real memory that looks different in the brain and that if so, that suggests my memory is real and I should confess it. I’m really working on stopping reassurance seeking as well, especially now that even after being told that nothing bad happened when the establishment I was at reviewed security footage, my brain is telling me “they’re probably just lying and never reviewed it.” I know I need to just stop ruminating, reassurance seeking, and mentally checking the memory, but I just don’t know if I can/should in case the image is what I should trust more, if that makes sense.

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