I feel like I'm losing my mind I can't trust it

This is extremely hard for me to say I have danced around it in previous posts but I simply cant hold it in anymore. The guilt that I feel for thinking these thoughts is immesurable and is driving me to want to hurt myself. I'm gonna start from the very beginning it all started when I was put on Fluvoxamine back then I had the bad habit of looking every medication that I was on up and with that I found out that a student with another student had brought a weapon to school and hurt many people with it. (I can't even write the word but I'm sure you know what the thing was) The intrusive thoughts didn't start then for some reason but later when at my school we had a threat of someone who was wanting to do the same thing. But then one morning I got the thought of what if I do that. And then it got worse I would get the thought every day. And then summer came by and I thought I would be fine but it came back when I went to school again this year it got so bad that I had to drop out of school. But for some reason I am still getting the intrusive thoughts and they are even more horrible now with images of me doing it, I get horrible urges, and my mind tells me that I want to do something this terrible. I want people to understand when I say this I don't want to do anything to hurt anyone and never have. I have 0 history of violence to anyone and have been in several situations like that where there was a threat and have felt the fear that comes along with that. I don't understand why these thoughts are there. I feel like I need to put myself into a mental hospital. I never want to hurt anyone and never will.

I'm so scared that by thinking about things I can make them happen. I know that's a central thing in OCD but I googled it and a lot of people actually say that if you think about stuff you can make it happen. I've been processing a lot of trauma and having intrusive thoughts about it and I'm so scared that if I think about people who hurt me it will make them contact me and it's making me feel really paranoid and scared and panic and I'm just so scared that I'm somehow conjuring bad people to come into my life and that I'm going to somehow get sucked back into my past or that I am somehow calling people close to me who could hurt me or that something bad is going to happen to me because my thoughts have been so scary and triggering. I'm also feeling really dissociated and I'm worried that these thoughts are actually me starting to have some sort of a psychotic break or something. Please help I'm so scared.

I haven't been officially diagnosed with OCD but when I learned more about it, I never related to anything more. A little back story: when I was younger, there were a couple of youth suicides in my area and the schools felt the need to have someone come in and talk about suicide. Well the person they had come in did a horrible job teaching it and basically made it seem like the smallest negative emotion or feeling or change in behavior made you suicidal. This ended up scaring me so much that I got horrid anxiety. Fast forward to now, Everytime I feel anxiety and panic, I fear I'm going to kill myself. Everytime I feel down and depressed, I fear I'll end it all. I'm scared to be around anything sharp because the "What if" I hurt myself comes into my mind. There are always intrusive thoughts at almost every point of the day. And it's not only for me. Everytime I hear someone being negative, I fear they will be suicidal. I know in my heart that none of this is true but it's terrifying me that it's stuck around so much that it makes me scared that maybe it is true. I've had a lot of death in my family in the past year and a half and a lot of other family drama that I'd never had before that is now also bringing up existential intrusive thoughts. And I'd never questioned anything about life before but now I get the "why is life like this?" and "does anything we do matter?" and I hate it. I don't want to think like that. I just want to go through life being able to handle things normally again. It terrifies me even right now going "what if you give up?"