I'm proud of you for whatever steps you can take to eventually get free of this mess.
I worked many years in law enforcement, and I'm still involved with it peripherally (specifically DV-related), so I'm a big advocate of calling the police, but I also know that can be dangerous if it isn't handled correctly (on their end, that is--most departments these days have advocates they can contact for you but some do a better job of it than others). That's why I suggested the advocate to help with planning, since this particular assault was over. You can still press charges if you like, but you may want to talk with someone first. Please, though, if you are in any immediate danger, call 911 first, and someone can help you further from there.