kids dad hit me

Me and my previous ex (kids dad) are not together and have not been for over 6+ months.. i’m currently 14 weeks pregnant with someone else’s baby.. I allowed my other two kids dad come over to see them since he is an otr truck driver (they have the same dad as well) and he turned it into something completely different. pissed off bc I don’t want him going upstairs etc.. we started talking about old stuff and he got angry and started hitting me in the head now I have a big headache.. he also chocked me while my daughter was in my hand 😒 any advice on what I can do? he is NOT ever allowed back here to see the kids.. he can see them on his weekends I was being to nice thinking he’d changed after not speaking for months