Heartbreakerqt....Welcome to A2K.
I am very sorry you and your child are going through this pain in your life. The fact that you are seeking help is the start of your winning this battle.
The first thing I would like to see you do is seek out your local Domestic Violence shelter, or the one nearest you. They will guide you through each process that you need to go through and asign an advocate to you. This advocate can even attend all court hearings with you. They are a great source of comfort and strength.....and they will be your knowledge base.
To get you started.....you will need to go to the courthouse and obtain the documents for your orders. You will need one for the Order of Protection and one for the ex parte, one to obtain temporary custody, and one for financial support if needed.
The Clerk of Courts will file these for you once you have them filled out. (Do not fill out the ex parte document yet)
You will go before the judge or magistrate (hopefully with your advocate by your side) and give your testimony at the ex parte hearing. You will tell the judge what all he has done to you. Don't leave anything out. Report even the threats that may not have been carried out. These are important also, as they all relate to the reason you fear him.
At this ex parte hearing you will also tell the judge what you would like him to do in order to provide protection for you. Besides having an order to keep him away from you can also request counseling for him. You can request custody of your child and make a plea that visitation be set up in such a way that the chid is safe. You can request not only child support at this hearing, but also spousal support. Also it is very important that you request he be prohibited from having any weapons. You may not get all these requests honored till after the final hearing but let it be known what you want.
If the judge determines that it is justified he will sign the ex parte and order a full hearing. (Usually within 7 to 10 days of the ex parte)
In the second hearing you will tell what happened in more detail. This full hearing is where you want to bring any witnesses that you might have to back up the abuse. Anything at all that you have such as copies of police reports, hospital reports, pictures, etc.
There is much I have left out.....but I have tried to give you a brief outline of the steps you need to take.
Just remember.....you don't have to do any of this alone. Your DV advocate can be someone for you lean on each step of the way.
If you need me...... just pm me and I'll help you any way I can.
It'll all be ok

Perhaps a bit overwelming at first but that's normal.
~Brooke
PS- I didn't specifically address your b/f's Mother in my reply but she must be included in your request for protection. The Domestic Violence Shelter will address with you all things I have left out. But I hope I have given you an idea of the process. Unfortunately it is not all cut and dry. The order for you child might indeed be given but perhaps with a stipulation allowing supervised visitation. That's why I told you to address any visitation issues at the hearing. Try to cover all of your bases from the get-go if you can.