AM I SICK? With more serious aches and pains, the questions become more specific—and more critical. Does the small cyst match our idea of a malignant lump? Is the stomachache bad enough to be appendicitis? Is the pain in the chest area merely—as many heart attack victims suppose—a muscle spasm? Indeed, reports the National Institutes of Health, most heart attack victims wait too long before seeking medical help. What factors influence how we explain symptoms?