Most Helpful Guy
Yes. It'd just be your word at this point. They'd need some kind of proof of a disturbance to actually do something.
Most Helpful Girl
I would tell her family about it. Also it is too late, but I could understand why you would want to tell someone. If she contacts you again, I would tell the police, you shouldn't let her get near you again. I saw the other girls comment, and ignore her. She is being mean and she shouldn't talk to you like that, especially when she doesn't know the situation. There was no reason for your ex to become physical like that. And since the other girl who commented wasn't there, she can't say anything. I can understand if she is trying to say you also started something, but if your ex got physical, when you didn't do anything physical to her, or threaten her there was no need for that.