Divorce and support

My husband and I are in the beginning stages of a divorce. The paperwork is being mailed/filed tomorrow. He was staying in our spare bedroom but today he decided to set up a “big boy bedroom” for our 2 1/2 year old in there even though we had agreed to wait. When I asked what his plan was to sleep he said he’s sleeping in “his bed too” and if I don’t like it, I can sleep on the couch. We’re getting divorced because he’s an alcoholic and a liar and has never put any work into our marriage and family. I’m so uncomfortable and stressed about him coming in “our” bed and I don’t know what to do. Do I just sleep on the couch? I’m getting sick to my stomach and anxious even thinking about him coming in here tonight.