First, are you in a safe place? It sounds like you are at your parents home and your basic needs are being met.
Second, call your local county human services hotline for domestic abuse. I apologize if that is difficult to hear, but what your husband has been doing and saying is domestic abuse. They can tell you about free and low cost resources for divorce advice and filing. Your profile says pittsburgh. The city may also have resources you can utilize.
Third, things can be replaced, but nothing can replace you. Report the abusive behaviors to the police if you haven't already. A restraining order may just be a piece of paper, but in a divorce case, it's evidentiary support for financial aid.
Forth, everyone needs a plan for the future. If you don't have an income, start looking for one. You said you were concerned about your credit. I suggest requesting a copy of your credit report. Then call your creditors. Start with mortgage if you have one, then car payment, then credit cards in your name only, then joint credit accounts with your husband. I called this credit triage when what has happened to you happened to me. These are the biggest 3 things that impact your credit.
Last, there are 2 aspects to divorce, the business side (legal things, money things, visitation with your step kids, etc) and the emotional side. Take care of yourself emotionally too.

I hope you get the support you need quickly. In my personal experience, the sooner you reach out to available resources, the sooner you will have answers.