Hi Katie, first off BIG HUGS !! I have been through several deployments and it never fails that as soon as he leaves someone is ill, dies, or something happens. SO kudos to you for keeping it all together.
My husband is a Company Commander, second time in charge, and he has dealt with these matters a few times. He has a soldier right now that is in a similar situation. Because they have deployment orders for early May, they aren't sure if his will be granted or not because he has had orders deleted before. HOWEVER, my DH has told him that his wife and children can go home while they are deployed to be closer to family if his orders stand. I know you aren't trying to get him to come home early, but if you can go back home then that's what I would suggest, at least to help out for a little while or until you know for sure what's going on. It is so hard to say what the military will decide since these things are case by case and it all depends on who is reviewing them.
I wish you luck and hope that everything works out in your favor.