My son will be 16 in June, 197 lbs. and has been having stomach issues. Today he has stomach pains, a headache , feels nauseas, chills and hot and temperature is 95 degrees? We went to doctor two days ago and all they can say is they are waiting for the results of blood tests. They told him to take one Prilosec a day for 14 days. He seems to be getting worse in the last couple of days.