You'll be okay. I think you should move, change your number and let go of any kind of contact with this person. If they still find you, call the cops. Get a restraining order on him so that it will break his probation and if he comes around and you call the cops they can arrest him and he'll just end up back inside.
I know that your scared and beyond angry with this guy but try like hell to get these things set up to try and protect yourself. If you have anyone you can rely on, have them help you with this. I've dealt with this, too. If you need to talk about it, I'm here. Take care.