So sorry for the ups and downs Beck.
my DH was so excited to tell people we were getting a divorce in the beginning. His good friend questioned the rapid need for it and how he could just end it after 14 years, he tried to tell him to wait out his withdrawal from his medicine (6 months) or go to counseling and work on our marriage. My husband turned all his friends advice back on him and said he should be taking his own advice (there are no issues with our friend and his wife). 
DH is now very cold towards me and loves to stab me with the divorce knife when he has nothing to pick a fight over at the moment. He knows it hurts to hear him talk about it.

i hope you are able to get your wife to the doctor and always stay in contact with your kids, especially the one from her previous relationship. Keep the lines of communication open so he feels safe coming to you if that whack job tries to hurt him in any way. 

Sending more hugs your way.