I am currently going through this. I get what you mean. Any little noise or anything you see at your peripheral sounds like hallucinations. What I have done is sat with the scary feeling of when this happens. I also watched documentaries and schizophrenia simulators. They are scary as hell but I’ve felt some relief. When the sensation comes, I will tell myself “must me going crazy” doesn’t mean that I like it or want to. But in the end, if you do have it you will learn to handle it just like your learning to handle OCD. Schizophrenia is just an illness like any other that can be treated. But people talk about it like they are dangerous. I’m sorry your going through this theme. I get it. It gets rough. You aren’t the only one and don’t give up !