I'm so sorry you are going through this. I was pregnant and alone most of the time. It was so depressing. I kicked him out then I took him back right before our daughter was born.
I have to tell you I am very concerned for you and your children. Things like this don't magically get better. I work with victims of domestic violence. This is a terribly risky situation. You never know when the worst can happen. He is a threat not only to you but your children. If you can't leave you need to get some type of help. You need a plan in place so that if he gets violent again you can escape. There is help out there. Contact a local Women's crisis center and start making a plan. Finances do no matter when you and your children are at risk. Things can be replaced, people can't.
I'll be thinking of you. Keep us up to date.