How to get rid a ghost or spirit?

There seems to be a ghost or spirit or something attached to me. It is changing the reality around me. Cigarettes are appearing out of seemingly nowhere. Shoes are being found in places that they weren’t before. Lighters are showing up out of nowhere. It is interacting with my reality and changing things around me. I don’t know how to get rid of it. It’s driving me up the walls. I’ve been hospitalized because of it. Any ideas on how to get rid of it?