hi welcome to HCM
-i had gone through your query and understand your concerns,i would come up with two possibilities.these include,
1.the first one may be PEPTIC ULCER;upper gasto intestinal endoscopy
may confirm the diagnosis.
2.the second possibility may be GASTRITIS;inflammation of the lining of the stomach.
this is also confirm with upper gasto intestinal endoscopy
possible cause for both conditions include;
-suppressed STRONG FEELINGS such as WORRY,ANGER etc.have caused the inflammations they will not get better until these feelings have come out into the open.
-drugs esp over use of pain killers,antibiotics and steroids
-eating junk food are some predisposing factors.
wishing you good health.