Hi.
I'm really sorry this is happening to you. What I would suggest at this point may seem awkward to you but please consider going to your parents regardless of what you think their reaction may be. They will freak out, definitely but not for the reasons you may think. Don't be so mindful of your pride right now and seek out their help.
Once they get tired of freaking out, they will realize that they will help you. Consciously be blind to their little snide remarks. These things are just normal at this stage so don't mind them too much.
What you do need to do right now is to show them that you are being strong in this time and that you will do the right thing as to raising your baby. If they even give a hint regarding abortion, stand your ground and make it perfectly clear that you want to keep your baby.
You can also seek out help from other places just in case your parents can't help you all that much. Go to your church and ask for their help. Nuns don't always get good reviews but that's being unjust to them. You may want to give them a visit even if you may not be Catholic.
If that BF of yours doesn't want any part of you or your baby, that's completely his loss. I can understand a guy realizing that he doesn't care for someone but to turn his back on his son while wanting children with another woman is despicable. Don't waste time on him anymore.
A friend of mine told me this when my dad died: God won't bring you to it if He won't take you through it.
Take care, honey.
Erick