I’m not fictionkin, but I’ve seen glimpses into other universes through my dreams. I’ve also communicated with spirits before. I’m very spiritually sensitive. Is there a term for what I am? Psychic medium, maybe?

It depends on what you believe about the other universes you’ve seen, spirits you’ve communicated with, and what you want to call yourself, anon. Without more information I can’t give you a really concrete answer, but you do sounds like some kind of medium.