Abusive relationship well pregnant.

Some say I'm a coward for posting this without telling who I am. But I can't. In everyone else's eyes I'm the 40 week pregnant couldn't be happier, soon to be married. Go getter. The man I'm marrying in everyones eyes is perfect including mine till today. Before I met him I was in a very abusive relationship. I was raped multiple times, punched, slapped etx. He ruined me physically and mentally for a long time I stayed with him for a year and 3 months before finally breaking it off. I met my current fiance a year ago. We have always been good we have fights but nothing like tonight. I loved him so much but now I can't see him the same. I opened up to him 2 months into the relationship about my ex boyfriend abuse to me. He promised he would never do that to me or hurt me. Tonight things changed. We were fighting and I lightly gripped his arm not hard at all I pretty much touched him as I was saying please calm down because when he gets angry it scares me. He than told me to shut up multiple times. Which of course I hate but I shut up. All the suddent he gripped my arm hard enough to leave a bruse of his fingers in my arm. And pushed down hard on my arm against the bed. Than he went to go throw a punch, his teeth were clenched and he hate the most hateful look on his face. But he stopped short. He did this to see if I would flinch and I did bad. I told him to get out of our bedroom and he told me no. And I said please get out and he finally did. But as he was walking out he said I have never seen someone so childish like you. And I said go to hell and burst into tears well covering my 40 week baby bump. I don't want my baby girl to go through this or me. I'll never see him the same. And he opened up things I tryed to get over from being abused before. I'm a complete wreck how can someone do this. I don't know how to coop with this.... I trusted him and he ripped open every wound I had from my past abuse and now this. I'm scared of him. I have never felt so alone again.

Update.

I have been together with him for a year. And I have known him for more than 2 years. Thank you for all the kind comments. And help advice. It really does help. He lives in my house. So I really have no option to leave since I live 36 hour drive away from family and I'm due any moment since I'm 40 weeks pregnant today. I thought I knew him. But I guess I don't this is the first time he has ever done this. And the fact that he did it even after he knew about my abusive past relationship. That's what hurts the most. My arm has brused over and I didn't sleep much. I haven't talked or seen him since this happened and I don't plan to for a while. I have alot of thinking to do. And if I leave I'm ending my engagment, leaving the father of my baby. And starting from scratch again. But as a single mom. So this is very hard. I know I can't stay with someone like this. And I know I need to leave. But it's hard.