Should I admit myself

I dont know whats going on. I dont know if its OCD anymore. I know it was in the beginning. Ive been through a lot of trauma and had one little scary thought of killing my sister 4 months ago that has blossomed into this giant idea of me being a serial killer and wanting to hurt everyone (I never had any social issues growing up but I have had some trauma). Recently I’ve been having urges to just give in. And my mental images have been horrible and I can’t stop checking if I like them or not. I think I’ve convinced myself I have. This morning I woke up a shaking mess with an urge to unalive my family and when my mom left for work I was alone with my sister and couldnt stop vomiting uncontrollably. I dont know if i’m upset because I cant hurt anyone and I want to, or if I’m scared and just want my old life back. I was an avid horror and gore lover and now I’m convinced I want to do the things I’ve seen in the movies. Someone please help. I’m ready to check into the psych ward.

Intrusive thoughts are supposed to be unwanted but when I’m mad I’m saying out loud “ I wanna stab them” and I feel rage. That doesn’t feel like ocd anymore I’m stressed and my brain also wants me to cover my dogs nose and suffocate him . I’ve covered it before and got anxiety and I’m scared I acted on an intrusive thought by doing that so I’m just psycho I guess about to snap

*tmi warning* I'm so worried im a P. Ive been crying daily unable to do anything else but ruminate over my real events. When i was 14 (before ocd) i was watching adult content and it was censored. The woman had similar features like hair and skin color as my niece. I remember noticing that and saying "huh i guess I'll imagine that as the adult version of my niece" and I did and after i was finished i moved on and didnt think anything was wrong. I dont know if i ever thought about that again? Its so blurry ocd keeps saying i did it again in a different time but i dont remember its too blurry and its scaring me so badly! I didnt even remember this till like literally last week and i wanted to die! Im 20 for context. When I remembered i immediately broke down in tears. I vaguely rmemeber this other thought i had of her when self pleasuring when I was 16??? I think it was a testing thought out of distress? But im not sure at all! It was extremely vague image and unrealistic i dont think I liked it but maybe i did?! Im so distressed its like i remmeber 2 versions of this particular event which is why I think its ocd false memories from there. Ive been ruminating and spiraling for almost a week. I keep crying i havent ate well at all in days ive been honestly dehydrating myself and i cannot sleep. I feel like a monster. I did the mistake of researching last night and kept comparing myself to the "criteria" of those sickos and like I felt so distressed. I also have been asking ai for hours on end everyday. I feel so distressed im literally crying rn as i write this i cant calm down i feel like this sick individual even tho I dont even like thinking of that at all i dont think I meant ill intent when i was a teen but its killing me inside. I would NEVER harm anyone nor want to or plan to, deep down i know I would never act out in those evil ways but like whats killing me is what if im attracted?! Is this a sign?! Am i one of those people?! Am i attracted to my niece bc of those 2 maybe even 3(??)thoughts years ago?! Did i mean ill intent?! Am I an actual danger?! Am I a monster??? I have so many urges to confess to my mom im so scared what this all means or could mean. I feel so alone and scared. Like legit whenever i get intrusive thoughts about gross stuff i feel disgusted and anxious and push it away. Those thoughts do not bring me pleasure whatsoever but this real event is making me doubt my own identity 😔