Any husbands shut down emotionally after finding out wife's pregnant?

Husband has become so distant since finding out about pregnancy. I've put on a little weight and I've been tired and throwing up a lot. Not exactly a lot of fun but.. finding it disturbing husband won't talk to me, look at me, flinches away when I try to touch him. Don't know what to do. I've tried in a very nice way to be like hey what on your mind babe? Let's talk... he just gets up and walks away. Won't acknowledge me at all.