I had asked for some further information and have not heard back.
There are many possible causes of chronic or recurrent nausea, burping, bloating, and abdominal or back pain.
The most common condition is a benign condition called irritable bowel syndrome, or IBS. IBS is due to altered muscular activity of the gut, and can be either an increase or a decrease in muscular activity. IBS is quite common, but there is no test that can prove that IBS is causing symptoms, so the usual approach is to exclude other possible causes.
There are a variety of other conditions that can also cause these symptoms, such as acid irritation syndromes, pancreatitis, inflammatory bowel disease, or a bacterial overgrowth in the gut.
Although it would require a proper evaluation to determine the cause of the symptoms, it may help to try some over the counter medicines. It would be reasonable to try a medicine for relief of gas, such as simethicone, which is available in many different brand name products, or activated charcoal, such as in CharcoCaps. If that is not effective, it would be reasonable to try a medicine to suppress stomach acid, such as ranitidine
If I can provide any further information, please let me know.