What should I do about a controlling boyfriend?

I met this guy 5 years ago. Dated a few times and then stopped seeing him because of gut feeling, met back up with him and started dating in Oct. By Dec moved away from family and friends to be with him, he has a 7 yo son I have three grown kids 25,24,& 17 and a 7 yo daughter, my question is lately he has been very disrespectful, putting me down in front of his friends and allowing them to do the same when I say anything he turns it around on me. He has become controlling in what I wear, eat or do, he is trying to talk me into giving up my new jeep and driving his truck because he wants to build a new house and says I can contribute this way, recently found out I am pregnant he blew up at me, I a medic working 24’s he says he doesn’t want any more children and I should have an abortion but I don’t want to. So what do I do? There are so many things that are “signs” and I feel maybe I should cut my losses now. He says he wont allow me to leave him and that I am his. I am financially broke as I pay my way here to include groceries and entertainment and for my jeep and insurance, any advice?