It looks like he's in a mid life crisis. This entire thing might not be what he expected and if that's the case it's really sad because I don't see where you did anything out of the ordinary. I would hope that he would want to do some sort of counseling to see if he can get his mind straight. This is really the best of the best part of married life. You're young and you're starting a family. Everything that goes with this is absolute treasure but he isn't seeing it. He needs someone to show him what he's missing out on. Find a counselor.
Your marriage needs more help than Yahoo Answers can provide. You are 32 weeks pregnant. You should not have to leave your house. Sure, he might be stressed, but he has to realize that you are too.
It sounds like he might be dealing with a couple different things; perhaps depression, or a mid life crisis. Either way, you two need to go into counseling. For your sake, and for the sake of that baby you're about to have together. If he doesn't want to do it, gently remind him that this is not only for him, but for you - and for his family.
I think that he is being a real jerk to do this to you right before you have a baby! This man is not a stand-up guy and I would not trust him anymore. You have been TOO understanding! He should be taking care of YOU and his unborn child now, not doing this selfish baby thing. I would stay with your parents (I hope that is where you are) and serve him with separation papers. If he can't be an adult then he doesn't need to be complicating your life right now any more. Stop pandering to him! If he is going to be the right husband for you and the right father for your baby, he will take the papers as a wake up call and work like the devil to get your trust back...if not, YOU DON'T WANT HIM! Your baby deserves to have its parents full attention, and while you are hung up on Mr. I can't be a good guy neither parent is thinking about what is best for the baby. I am so sorry that he is acting this way, you don't deserve that. May God watch over you and your child!
You both are doing some dumb things that will ruin any marriage. You imply that everyone says things they don't mean, when they are angry and they don't! Its not fighting fair! So, you say something to him, and he is still angry about it the next day and continues the fight. You take no responsibility for what you said. You were wrong, and should apologize. Then, you leave the house. Why would you do that? How would leaving help your marriage? He didn't ask you to leave. You need to think about your actions, because it doesn't help. There would not be any stress, that could harm the baby if you weren't saying things, without thinking first, and then leaving him to give him his space. If you want to save this marriage, go to counseling, and be honest and so should he. He can't expect a relationship to work when he doesn't communicate, in that respect, he's screwing up your marriage as well, but its both of you, and you are contributing.
You said "I'm being serious and just need to talk to someone and get some advice.".... It would be a whole lot better to find a real life person like a family member, pastor, older member of the community, friend, to sit and discuss this with you and your husband, face to face, rather than some random stranger on YA where you have to type a comment. One answer will not be adequate. You need a good old fashioned discussion. Since you posted this last night and it is here again, should be indication that this may not be the best avenue for this discussion. I answered your original question last night, so understand I am not trying to deter you from finding an answer. I see you also used some of the points from those answers to add to this question. This may just not be the place to really find answers for your particular situation. Good Luck!