My son had a onset while eating,he had costal chrondritis pain on his left side near the sternal area. He had difficulty swallowing, continued belching and began having shakes all overThis begins when he eats, he is a borderline diabetic, does not take insulin, has hbp but is on medicine and is under care of a cardiologist and family doctor. This really frightened me but he gradually got better What do you think happened.