What a great mom, threatening to kill your baby if she doesn't get her way.
I would just try to be loving toward her even though she is being that way, and tell her you love your child and want to raise it. If she sees that you view the child as a child and not a "blob of tissue" to be destroyed as abortion-supporters would falsely say the child is, hopefully she will be horrified by the thought of murdering her own child.
Pregnant women are going through a very difficult thing, especially in the circumstances you describe, unmarried, broken up/exes, animosity...etc. Even if she is bitter and angry and hurt or whatever else she is, she is now the mother of your child, so try to show her kindness, patience, and love, whether she deserves it or not.
Don't let her behaviour dicate who you're going to be. You are the child's father and she may not deserve tenderness or kindness, but you can decide to be your child's protector, and a man of honor and compassion.
I'm not so sure about that. In CA they don't. You may file a divorce there. Or better yet, ask a divorce mediator or seek mediation services as they know better as to what is good for you in your state. Mediators will try to resolve your case without a sky-rocketing bill. Not only are lawyers expensive but you also have to attend lengthy court proceedings scheduled at lengthy intervals. Mediators are your best bet.