O my, this is alarming to read. I have a question for you. Are you financially dependent on him? Is your home a rental, is he on the lease or is he on the deed? This sounds scary and very upsetting for you and your child. It will only get worse, you deserve much better. Could you go stay with your mom while you look for work elsewhere?
In the mean time, I would say a house alarm would be a good thing for you. It will sound very loudly and will immediately summons the police. I would say you need to have a free consult with an attorney to get an order in place to keep him out of your home and away from your child.
Don't let this become your normal. More importantly, don't let this become your child's normal. You child has to be your #1 responsibility.
Good Luck and God Bless.