Fighting w boyfriend

I've posted here before about how my bf (that I'm living with and have a baby with) is overly friendly at work. His boss talks to him inappropriately which causes us to fight. And makes me feel super paranoid about him cheating. A couple nights ago we got in a really bad fight, I pushed him, he pushed me back  and I ended up hitting myself on the crib and ended up on the floor. He tried to help me up, and we went to sleep. I have a bruise on my back and I can barely move bc of the pain. I know it was an accident but holy shit , it hurts. All of this happened on Wednesday night, and he hasn't talked to me at all. He's pissed and idk why. I tried asking him if he's okay and all he says is that he wants me to leave him alone. I feel so horrible. Any advice would be good. Thanks