From my understanding, you should still be able to receive care for your pregnancy regardless of insurance. Try calling the billing office of the hospital to find out but I'm almost positive that there's a law about that, which provides medical care for pregnancies without insurance. I'm sorry I don't have more info but I remember reading about it or hearing about it before.
Even if you are unable to get medicaid, the baby should still be able to. Have you spoke with a case worker?