Need to vent and figure things out

Today I was taking a nap. My husband woke me up to ask me to make dinner, which was fine. As I'm getting up off the couch, he's complaining about how I need to get up and do it because we're not going to his brothers (the original plan was we were making dinner together with his brother and his wife). I said okay and continued to wake up off the couch to start dinner when he just freaked out and got angry. So I decided rather than arguing all night I'd just take 2 of the dogs that are mine and go on a drive to help things calm down. He starts texting me about how he can't do this anymore, my dogs (who he was just cuddling with) can't come back to the house ever, he just wants out of this. I responded that I just wanted to make the lasagna, and continue the great day we were having, as we had been baby shopping, watching movies together and generally just having a fun relaxing day together. Instead he told me he wants to divorce. Now every time we get into a big fight, he says this. He's never meant it. But I told him I wanted to go to counseling and keep working on us, after all, we're about half way thru this pregnancy and I don't want to give up on our marriage - we've been together nearly 6 years, married for almost 1. He told me no, he wants nothing, just to be rid of me. I said if he really wants that we need to discuss baby stuff to be able to include it in paperwork, thinking that would make him take a step back and realize he's being a dummy and just saying shit because he's angry. His response was that we don't need to, because he wants nothing. That broke my heart worse than anything else he could've said. I'm not sure what to do. I'm laying on my parents couch with my dogs, trying not to cry because I don't want to tell them anything if he's going to stop this dumb stuff, feeling our baby kick. I feel so lost. Please help.