I know you feel like kicking him in the nuts right about now, but your BEST option is to stay away from him and move on with your life. You have a baby you have to care for now, so concentrate on that.

As far as his new gf goes, the best you can do is warn her of what happened to you. If she believes you or not is her decision and she will have to live with the consequences.

I'm sorry for what happened to you and wish women like you stop being so naive when it comes to men like that :-(