So, the results from the endoscopy biopsies are... he has no sensitivity to lactose or sucrose, but he has superficial gastric inflammation. They are not sure what is causing this, and so far the only suggestion is to increase his Nexium to twice a day. He has vomited once since we have done this, and seems to be still having reflux, but mostly in the morning. So, hopefully the double dose of Nexium will take effect soon! Despite vomiting, he is continuing to steadily gain weight, and he is over 90 lbs now. I hope his height will catch up with his weight, because shopping for all new clothes has been challenging!