A couple of things.
So, you are still upset and he wasn't taking your comments seriously.
The chances are he'll be at it again soon. This will be the test of how serious you are. Do you think you've given him an ultimatum? In other words are you going to go if he starts up again? If you don't then the message you're giving him loud and clear, is that he can abuse you and you won't react. Expect, that from giving you verbal abuse it will degenerate pretty quickly into an odd slap or two, then an odd punch or two. Once you've had a baby it'll become a regular thing and more violent as he'll think you've trapped him and,paradoxically, you can't leave and are at his mercy.
This is a man without any self awareness who is harbouring deep feelings of resentment against you and, as we and you know, can't or doesn't want to control his 'teasing'.
This is a man who teases you more if you complain. ( He really is quite a nasty person. ) What about when you are ill or pregnant will he still be teasing you? Of course , even more, because that is what bullies do : they pile on the pressure as soon as they see some vulnerability.
What else do we know about him? He's very immature, can't control 'his body parts', is not living with the mother of his child. Is he even supporting his child financially?
Well, you've seen the future. He left ( or did she throw him out? hopefully.) his girl friend no doubt because he couldn't face up to the situation. He'll leave you too when things get real. Anticipate this and leave him instead. Be thankful you haven't got a child together and have to have a relationship with him for years to come.
A word of warning. The most likely time for him to turn violent is when you tell him you're off. His ego won't like it. Make sure you tell him in a public place preferably with a table between you. And make sure there's some one there to take you home. Change the locks if he's got a key.