Help needed

Two things are happening: I get thoughts that just keep looping. They almost feel like song stuck in my head. Also, I’ll imagine something and I feel my stomach drop. Then as the seconds go by I keep getting fragments of the this thought but with different details. For example, it’s kinda like how a “vision” is portrayed. I’ll get a glimpse of the thought and then it’ll rapidly expand into something worse every few seconds. I don’t know if I’m causing this or if it’s just an automatic thing like any other intrusive thought. It feels unavoidable, idk if this is a compulsion or if it’s just another manifestation of an intrusive thought. Apart from that remembering an intrusive thought triggers the full thought again and then it just keeps looping or expanding. I don’t know how to stop any of this. Help?

hi, i have been to deal with this myself, but it’s not working, my theme is what if i’m in a simulation, like what if none of this is not real, and every time i try and get help i think” what if the simulation is trying to convince me im not in a simulation” i don’t think this is going to end.

Having ocd that I’m gonna become this horror movie guy, how do I fix this lol it’s crazy