Hey momofseal,
I have a son that is a SWCC and is getting ready to go to Iraq for his second tour there. I know the feelings that you are having.
On his first tour he did manage to call quite often and although he could not talk about what he was doing it was nice just to hear from him and know that he was OK.
I have always looked at is as "No news is good news"
Hang in there and take day by day and before you know it he will be calling you letting you know he is on his way home.
Take care and if I can help in any way just let me know.