My goodness, IMO this guy is a must miss. 26, 3 DUI's, 4 children with different mothers,
he has nothing to offer you or anyone else. Addicts make lousy parents and relationship partners, without recovery, they have nothing positive to offer anyone.
Get yourself some help in the form of therapy, stay away from him, go no contact. Your child must be your priorty, not some abusive drunk.
Take some time to read the stickeys at the top of the Family & Friends Forums, read Codependent No More by Melodie Beattie, knowledge is power, you should learn all you can about addiction, you are going to have a child to raise, and the child deserves one responsible parent, it must be you.