My son was always sick at least 1or 2 times a month. his main symptom was a high fever. When ran test could not find anything. We assumed since it was the school year he was picking up small viruses. Now he is starting kindergarten and the doctor did his physical and is concerned about his weight and he white blood count is up again. She wants to do a test for celiac disease. And his glucose was a 61. What is wrong with my son