Would you stay and work it out??

My husband and I have been arguing for a few days. During the argument I said that I do not think we are working. It's emotionally toxic and unsafe for our other children. I'm currently pregnant with our first girl. He pointed at my stomach and referred to the her as "as to that thing in there, i don't want any rights then, I'm willing to sign my rights over as long as I don't have to pay child support" "i didn't want it anyways" then went on to say "I'll keep the rights to the boys even though I didn't want them either". And is now trying to say this is a small fight and that i am overreacting and throwing away our marriage and our children's lives.