FW, I can't help you with your specific question, but I just wanted to add my shoulder to the load you're carrying. I can only try to imagine how you must feel watching your son go through this. He's very lucky to have a mom like you. I hope you go into the Family & Friends forum and that you link up with one or two of our other AS moms. There's nothing like talking it out with someone who undertands.
Many hugs,