My Son Is Suffering Nausea And Resulting In Vomiting But

My son is suffering nausea and resulting in vomiting but doesn't show symptoms of fever or diarrhea. He has been suffering with this ailment for about a week now. His pediatrician has ordered blood work and suspects celiac condition, but he has not eaten anything with gluten but still vomiting. He can't seem to keep anything down but drinking iced tea seems to calm his stomach.