Existential OCD and Physics

I’m really struggling with this theme because it can make me feel “fake” and it creates doubts that the world around me isn’t real or it’s a simulation? I’m really trying to expose myself but even the possibility makes me incredibly afraid. It even plays into my suicidal ocd as well and makes me afraid that my life would be miserable if this was true. I know how ocd works and I know not to fully believe that. But at the same time, I am trapped in doubt and fear. How could I possibly accept this? Will I ever see the world or life the same again? (Don’t answer that I realize that’s reassurance). Idk this theme is so ass.

I used to get caught in a loop with existential thoughts very frequently. Every question made my stomach drop: (TW: existential questions) … … ... "Why does anything exist at all? What will death be like? Is anything even real? Is there any meaning to this? Is the universe infinitely big, and if not, what's beyond it? Are there multiverses? Has the universe been around forever? Will the universe end for good, or will it keep going forever? What is forever like? What even IS reality?" It would get so overwhelming that I remember lying on the floor in a fetal position for hours because I felt like there was no escape. I spent most of my days reading articles and watching videos about theoretical astrophysics and philosophy in a desperate attempt to "figure it all out." Of course that only made me more anxious, raised more questions, and kept me trapped in the cycle. Things started to improve once I learned to turn TOWARD reality, rather than away from it, and ERP really helped me do that. I learned that these questions weren't the problem. I learned that I can actually handle the anxiety that arises when exposed to these ideas and concepts. I don't have to figure anything out to make the anxiety go away; it arises and passes away on its own. Ironically, bringing myself into the present moment and becoming more aware of reality helped me escape the cycle of existential dread. Because of that, this topic no longer takes over my life. If I'm triggered by something I see, hear, or think, I may still feel a little twang of anxiety, but then it just goes away. "Maybe, maybe not" has been the single most useful phrase of my life. Do you ever get trapped in a cycle of existential questions? Are you worried that the ERP approach would be too scary to handle? If so, I'm happy to give my advice.

This is my first post, so I apologize if the formatting is weird. I experience existential ocd I always struggled as a kid but learned more and more how to manage with school and such forcing me to learn how, now I experience a lot of overwhelming intrusions from when I wake up to when I go to bed (simply because I live and work in the same place it gets cabin feverish) but now more often going out maybe it’s just paranoia, I walk into a place and each person comes with a story immediately, every piece of trash on the floor, every piece of produce, each isle is a brand new way I could get into a life altering situation. I’ve managed well enough but sometimes I just completely lose my original objective and just leave or I’ll wanna leave my house but everything that goes with it and that could happen pops up and I just won’t go. It’s started to become avoidant behavior. Any help or similar stories? I just feel like I’m going crazy but my thoughts are so scattered and immediate it’s hard to break the habit and not spin a story. Thank yall!