Open Question: Health advice please! My 24 yr old boyfriend has had these symptoms for about 5 mnths now…?

Terrible heartburn, chest pain, stomach pain, and fatigue. They have already begun at the same time is very sudden. He had tried to give him the doctor who heartburn drugs, but they did not work, symptoms are getting worse, even. He was sick and the suffering, do we still have him tired? I have been told this may be allergic to wheat 2 / 3, he had begun to eat whole grains and wheat, a lot of things recently, but we do not know.