Let us suppose your story is true
Could it have been pizza? I mean I've gotten vax. Nothing here. Roommate too he's fine. Others too. So likely it wouldn't be vaccine unless
The unvaxxed see gruesome terrifying images. But then other unvaxxed haven't said having hallucinations. So more points to pizza
However many people love pizza. But don't hallucinate. So maybe it was your pizza or just you
Or you're trying some new plot twist for Kult or Call of Cthulhu. Which has promise but really it's imperfect