Husband said he would leave me if I’m pregnant again

So, I’m a day late on my period. I’m on the pill. My husband and I have 3 kids already, and he said that “hes not having another baby”. So, I asked what he meant by that. He told me that if my test is positive, I need to abort my baby or he’s going to leave me. I’m so incredibly hurt by this. What should I do/say?