I had a similar situation happen in my house for months. The advice I will give you is this. DO NOT provoke whatever it is. I tried that method and it seemed to increase the activity. When I got angry and viewed and acted maniacal it got to the point of a visual manifestation. I do not take mess so there is no chance it was a hallucination.

As others have said, ask it to leave and sleep with a light on. I went with an old superstition of placing my shoes facing opposite directions by my bed. Apparently, if its a spirit or ghost it will get confused at the sight and leave. I know it sounds wishy washy but it worked for me.

Above all else remember that these entities feed off of negative emotion and energy.