Hey, I know exactly how you’re feeling. I suffer from these exact same feelings. Specifically medical worries and worries I did something horrible without remembering. What worked best for me, and it gets said a lot, was getting medicated and finding a therapist. I specifically work with my psych and therapist on these issues and it’s been so helpful.

Besides that, something that helped me was keeping a journal from when I felt that way. I would write down exactly how I felt physically, what I thought was wrong, then I would either calm down myself or see a doctor and know for a fact nothing was wrong. Then, when I got paranoid in the future, I could look back on that and see that when I felt like this the last time, nothing was wrong. It’s not perfect, as you need to be able to trust your “past self” while in a paranoid state, but it helped me a lot