What do i do?

I found out i was pregnant 2-17-17, and my ex is the father. I did have sex with another guy on 2-10-17 but we used a condom and he didnt finish anyways. I lied to my ex about having sex with someone else because, it really wasnt his bussiness and it didn't matter. I told my ex and he doesnt think its his and he starts saying he hate me and that abortion would look real good about now. And he said anothers man penis been in where my baby has to come out. And im like why he so mad? And he said hes going to take care of the baby if its his. But he said other mean rude things and i don't even want him in me and kids life. Im not tryna be a grimey BM.