You need a real estate lawyer. Check with the American Bar Association, IL State Bar Association, Chicago Council of Lawyers and/or Pro Bono Advocates. All are listed in the phone book and all have referral agencies.
How can you sell a house in your Dad's name?
As a single mother, there is a 99% chance your ex-girlfriend is going to get sole custody of the child....and you will get stuck with visitation only. You would have had more rights if you had married her but that is too late now. (If your ex really wants to stick it to you, she could get married to one of her friends in Florida and according to Florida state law, her friend would be the father of your biological child and you would lose all rights to him/her.) Also, since you have been convicted of both assault and domestic violence, that probably reduces your chances of receiving 50/50 custody to zero.
I suggest you focus on getting the best visitation you can obtain AND go to anger management classes. Good luck and God bless.