He's leaving me..

My husband is deployed at the moment and our relationship up until he left was PERFECT. But it's now been 4 months since he left and suddenly he's decided that this is too much for him and he wants a divorce. I'm trying everything I can to convince him to stay but he won't even try and work with me.. The worst thing about it is I just had our son one week ago.. he hasn't even met him yet.. I'm terrified that my son will grow up without a father like I did.