When having stamatch issue with ulcer, it need time for the stomach lining to heal. minimum 2 weeks for pain to subside. assume CLO test is negative.

but the indigestion and bloatedness or other GI symptoms need time to resolve. from a month to half year

lifestyle modification is important, change your meal to smaller portion don't eat too full, meal time on time and avoid oily, spicy, citrus and caffeine food. until your symptoms subside.

If you overweight, then is a good time to made a change. some light exercise included to help.

Try to log/write down what food will trigger the stomach issue, and avoid having these food during these time.

If you still having issue after a month, i think you can take your exam report to see a GI specialist for further investigation.