How to keep it together?

Nothing has been working out during my pregnancy I'm 30 weeks along. This will be my first. My boyfriend already has 4 kids with two other different women. I don't have anything that I need for the baby yet. I'm stuck paying a car payment on a car that broke down on me(engine) a couple months ago. All of my boyfriends money goes to child support everybody just keeps telling me that he's going to do the same thing to me and just leave me. I don't make nearly enough money to support myself and the baby, I still live at my moms and his car just broke down (transmission) a day ago. How do I keep it together? I can't take much more.