I wanted to say WE did not make this decision. But knew it would blow up so I merely end back to him and said you have decided to keep the ball rolling with everything
This jumped out at me, only because I remember my H behaving in a similar fashion to yours early on in this crisis. I also remember when I plucked up the courage to say that I didn't participate in this decision, that WE didn't get anywhere, that this was all him.
Of course it didn't go over well, but one good piece of advice that I had was not to be afraid of monster -- not to be afraid of him blowing up about anything.
It took me a long time to get through the "understanding" part; I, too, felt that he was so depressed and that my role was to be understanding and supportive pretty much no matter what.
I learned that "coddling the patient" wasn't a good way to proceed; it wasn't showing him support, however much I wanted to do that and wanted him to see that I was doing that.
I remembered lessons from world history -- "appeasement never works".
It was scary as all heck to say things like: I didn't choose this, there is no "we" in this decision, but it definitely helped me gain some perspective.
I had three young children (no baby, though) at the time as well. I was trying hard to tell them that daddy must be going through something, that I was sure he loved them, etc, etc., but his actions were showing anything but that.
And I was so afraid of divorce that I was shaking with fear day in, day out. Please don't be afraid, it is much more important to get the legal advice and get your ducks in a row as much as possible.
My H promised that he would take care of us, that he would take care of the children; I believed him for a long time, because I wanted to, and because that was who I always thought he was. Getting through that took years for me, but if I had continued to trust that he would do so the children and I would have been left without anything.
I also know that when I was told things like this early on in the process it was hard for me to take it in, I just couldn't square it with the person I thought he was, and I genuinely believed that if I kept on being "good" that we (yes, we) would get through this.
Treasur has very good advice here.
I know this is hard, hard, hard. And we all so much want our spouses to get through this, we want "us" as a couple to get through this. But the comments are right, he isn't treating you well at all. And it won't hurt anything to make that clear.
hang in there, you really are doing very well, even if it doesn't feel like it.