I just went through this. But in my situation, there had been violence before and I never reported it. You cannot worry about what happens to him. He didn't worry about what was happening to you during the violent episode. It may be the thing to stop him and know you are setting up boundaries for him not to do it ever again to you!
It gets more and more difficult to stand up to them. I think the longer this goes on the more guilty the victim feels. That is why cases are dropped so often. But you need to go tomorrow and show him it is NOT ok to treat you that way! You didn't put him there, his actions put him there!