SB, I've read your thread but don't think I've posted to you before. You've gotten lots of good advice. Don't spend too much time worrying about whether he is WAS or MLC, you need to detach either way.
Being pregnant certainly adds another dimension, hope you are getting help and support on dealing with depression, etc. Look for resources in your area.
Try to make your life an H-free zone as much as you can. Turn the focus on you and your kids, they need it much more than he does.
The more you react to him, the more he will say "See, I told you so!" It's just not worth it. You will not change his mind.
So let him go, and continue your work on you.
You can do this.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss