Sorry, but I would not set foot in a room with this man without police around. He sounds dangerously unstable, and is manipulating you emotionally. Using suicide as a threat is emotional abuse. He has abused you physically and mentally before. You clearly have a big heart, so have given him a chance to reform his behaviour.
I think it's a good thing that he is not seeing his child. Please, please contact police if you haven't already done so, particularly as you are pregnant. You are responsible for your own well being and your children's well being, not his. Take care and keep safe.