Some advice and support, please.

I just found out I was pregnant by my ex-husband. We already have two little ones together (4 and 3) and he's pretty upset. He's been calling me stupid and telling me that I'm not good at anything else except making babies. He's also denied that it's his, but is pushing for me to "take care of it."
I really want the baby, but sadly I'm the only one who does. :(
Should I keep it or should I give everybody else what they want and get rid of it :((?