HI, thanks for using healthcare magic The upper abdominal cramping, gas and burping may be related to gastroesophageal reflux or may be due to use of particular foods. Certain foods are associated with increased gas production such as broccoli, cabbage, cauliflower, beans, turnips, carbonated drinks, brussel sprouts. Reducing the use of these foods and using reflux medication would likely help with your symptoms. Examples include nexium, prilosec, prevacid, protonix, pepcid The back pain may be unrelated though excess gas can sometimes cause back pain. You should consider imaging of the back with an x ray to determine the cause. It may be due to arthritis or other changes to the bone or related to the supporting muscles. Fatigue occurs with any persistent illness. I hope this helps