I was in a similar situation. First of all, at this point your hormones will make you think and feel all sorts of crazy things. Not a good time to make any kind of new major decision.
Second. If you have a secure situation with the baby's father you might want to seriously stay put for now. I don't know what kind of resources you have (family, money), but things can change.
Third. I wanted to leave my bf but was pretty sick with morning sickness so I thought "as soon as I have my son, we are out of here." Well there were complications, I had a c-section with complications to that, followed by more complications. I physicaly impaired for over a year. No way I could have taken care of my self not to mention my baby.
You never know what might happen, good or bad. Please take your time to decide and make sure you have a back up plan.
I wish you the very best of luck.