Hey my friend:
I'm not sad for your son, because it seems as though he is where he wants to be at this time. But, I am sad for you because I can definitely relate to the pervasive worry.

You already take care of yourself in many ways, so I hesitate to offer trite advice. Perhaps tea or lunch with a friend would help take your mind off it for an hour ;-)

Just want you to know that I'm thinking of you...

LMo