First of all, welcome to this Forum, but sorry for what brought you here. I'm sorry you have to deal with this at any point in life, but especially at 8-month's pregnant.
Read the "stickies" at the top of the Forum page, and here's a link to one in particular. The punch line to all of your questions is this: you can't do a darn thing to help them - they need to do it themsleves. No amount of: screaming, begging, crying, sweetness, sadness, controlling, manipulating (they do enough of that themselves), and guilting, will get them to recover.
More people will be along soon to offer support and experiences. Take care of yourself and your baby - those are the only two things you can control right now.
http://www.soberrecovery.com/forums/...l-problem.html
Best of Luck.
C-OH Dad