As I read these posts, I just cry for you. With each tear I thank God for answers, for health, and balance of Body, Mind, and Spirit. I thank him for your strength and peace of mind as you help your son.
Please don't think about any negative possibilities. You are surrounded by prayer, love, and light. Focus on the positive. I once knew a lady with late stage aggressive cancer who attributed her total healing to one statement made several times a day. "Thank you God for my healing." Prayer is very powerful, and you have our prayers, you have our love, and you have our concern.