I don't know what to do

Me and my boyfriend had a really bad fight this evening. It's not an uncommon occurrence since I got pregnant, but it was really bad this time. He screamed and screamed, called me so many terrible things and threw things. Later on he even pushed me hard enough that I fell onto the ottoman. Granted it didn't hurt and I'm unstable... I'm just worried. I don't really know where to draw the line or if that's behavior that shows he might do something abusive in the future. I don't really know what to think. I just really need advice.