58, female for months would fill up with air while exercising, cleared up 30 mins. after with the help of much guttural belching (no smell or taste, just air). Last 2 months continuous guttural belching along with chest, arm and back pain (right inside shoulder blade.). I have a physical job and cannot perform my job most of the time. I've tried not eating, eathing, restricting certain foods. Nothing seems to help. Heart, gallbladder tests show no abnormalities, Upper GI showed no problems. I am at my wits end.