Metaphysical/trans-themed OCD.
I'm trans and I have an obsessive fear of permanently reincarnating in a female body in every possible lifetime, my brain generates rituals to "pervent" it constantly, I just failed to do one of them and it caused an anxiety spike. It's a very exhausting obsession, performing rituals is exhausting. Don't say stuff like "reincarnation isn't real" it's really not helpful.