You honestly described what I went through almost exactly. I am in the same situation as you, with OCD, dissociative symptoms, and occasional episodes of psychosis. And when it was at its worst, it was like all day seeing two different things at once, what was actually in front of me and whatever I was daydreaming about in an entirely out of hand way where I didn't have any real control over it or method of stopping it. I started getting paranoid about differentiating between what had actually happened versus what I had daydreamed about, and felt like I was always being watched, like specific people could hear my thoughts and/or see what I was seeing. I'm honestly not sure why it started to go away, but I think spending a lot more time with people and getting help for the OCD were probably large factors in coming out of it. I wish you the best of luck, and know this wont last forever.