The burning sensation you experienced is likely related to the acid production in your stomach. Although a trial of treatment with PPI is a very common practice, symptoms which persist should always call for further attention and perhaps a proper review and reevaluation.
Besides H pylori infection, gastric and duodenal ulcers or gastric growth may also present with similar symptoms. Other conditions such as gallbladder stones and pancreas problem can mimic gastric pain from time to time. A such, it may be more prudent to ensure no serious problem is brewing.
May I suggest for you to seek help from a gastroenterologist so that he or she can help to evaluate your problem further to recommend the next course of action. Best regards.
- Dr Quan