Please, please find another Dr. possibly an allergist. Your son sounds exactly like many of the babies born in our family. My grandson was so highly allergic (and still is) to any kind of dairy products that just touching his skin with something that has milk in it, sets him off screaming, vomiting and etc. He has been raised on Soy milk and is otherwise a healthy 6 year old. Please get him off the mothers milk and onto something he can tolerate. This tiny little person can't tell you where it hurts. God bless your family.