Gosh Jenn!! What a whirlwind of emotions ~ heartache and hope all wrapped up in to a few days!! I'm so glad you were able to spend precious time with your son (I'm sure he appreciated it as much as you did!)
One of my friend's (aka co-worker) son joined the military last year and she was a basket case to say the least. There were many days of tears and worry that she shared with me - but little by little things calmed down for her. Once her son found his own peace of mind, it helped her tremendously! He's now overseas and that leads to a whole different realm of emotions and concerns for her, but he's happy and doing what he wants, and that too, makes her feel at ease.
I will be whispering prayers for peace for you and your family and for a smooth transition into a "new life" for your son! Very thankful your DD wasn't injured and that you had a friend that could take care of her! Sending you big cyber hugs my dear friend!!