G.,
It is so weird that you are experiencing the same thing that I did with my son a little over a year ago. My son is allergic to milk and eggs also. He started having TERRIBLE diahrrea and then came the vomiting. He would vomit every day - sometimes 3 or 4 times a day. We got him into to see Dr. Ogunmola at Cook's Childrens and he is the BEST gastroenterologist. For our son, he held off on doing an endoscopy and treated him with Prevacid for 3 months. He stopped vomiting and started having normal stools. My son LOVES Dr. Ogunmola and we have had such good experiences. My son is still allergic to milk and eggs but we do give him soy products without any vomiting or diahrrea. There is light at the end of the tunnel...I promise. It was the best money that I have ever spent. Your son will be fine and I am sure that they will get it fixed for you as they did for us! We will keep you in our prayers. I know how difficult it is. Feel free to PM me if you ever need an encouraging word!