GASTRIC PROBLEM. Gastric problem only.

Dear doctors.. My have have a problem of gastric from the last 1 year every month or 2 months once she facing the problem.. that time she is unable to bare the problem.. starts with back pain and slowly comes down to the left side of the abdomen.. visited surgeon he prescribed razo-L for 60days before breakfast.. we used but the problem remains same at the time of pain we used mucaingel.. eno.. etc gastric refiefs some time it also not works for her... after vomiting she was feels happy..and problem will also solve after vomit the food itself.. doctors told its gastric problem only.. we used all prescribed but no use.. she is still facing the issue 1 or 2 days once in every month or 45days. waiting for the best advise..