Husband doesn't want baby

We have two kids and were trying for our third. Had two miscarriages and decided to wait a while. During this time my birth control failed and I fell pregnant. I took this as a blessing but when I told my husband he said that he's now decided he doesn't want anymore kids and is happy with two. He wants me to get an abortion or he says he will leave... I don't think I could ever get an abortion when I could afford/look after baby well but I don't want to break up the family.