Girl right now more then anything he needs for you to be strong for him. I know this seems tough for you but have you thought yet of what he is going through? He needs your support and it will just make it much much harder for him to concentrate on his job over there. You need to let him know that your going to be okay and that you will be waiting for him to get home. I know its tough but it's harder for him right now and you need to realize that and make it as easy for him as possible. I think you should also seek out council. Also make sure your meds are right. If you feel at all suicidal then you need to go to the doctor asap. Be tough girl, thats what us military wives are and if you cant do it for yourself do it for him.
I'm about to go through this for the third time and you know what, he needs to be focused on his job and getting home safe, not worrying over wheater or not your going to have a mental break down.
I know that sounds tough, but I think you kind of need a slap in the face to realize that you will be okay. Life does go on.