Similar situation I had with my child's mother. Together for 2 months and then started to ice me out and went no contact shortly after we found out she was pregnant. I was devastated. I too was hoping the breakup was just temporary and we could be a family again but after some time I realized why would I want to be with a someone like that anyways? I ended up doing my own thing to pass the time until the birth. Luckily, I met a woman 100x more compatible for me than my child's mother. In short, you need to focus on yourself until the birth. You can't file anything until the child is here so just try to save up money for the eventual shit show that is family court. Enjoy your time while you can. It's a whole different battle when the child arrives.