My baby's father and his mother are threatening to take away my baby when its born and I don't do drugs, I don't drink, I do everything I am supposed to during my pregnancy and I just don't want to get attached to this baby for somebody else to take it away when they don't give me money for anything I need, and they don't come to doctors appointments. What would make the courts favor them to be good for my baby

They can't just TAKE your baby off you.
They would have to take you to court for full or joint custody.
If they don't have anything they can use against you to prove to the Judge you are an unfit mom then they can't just get full custody.