Persons with hypohydrochloria (lesser amount of acid) or ahydrochloria (no acid), will experience an intolerance to some foods because they lack enough acid to chemically digest their food. Also, persons lacking acid may experience symptoms similar to ulcers or gallbladder disease. Common symptoms are heartburn or a pain at the bottom of your breastbone. Persons with ahydrochloria have the opposite problem a person with ulcers has, too little acid.
The acid pills your doctor prescribed will help you digest your food and you will notice an improvement in the way you feel after meals. If the pain continues, by all means, go see your doctor.