Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.F.
As you describe it is a typical picture of peptic ulcer
, or its precurser, means it may lead to peptic ulcer. It always have relation to the food. You are fearing but it may be relieved if you eat some bland food. some times it may be increased after having food these two differentiates the two types of peptic ulcer. It may be a referred pain
due to pain from a cardiac origin like angina
I advise you to consult a gastro enterologist for diagnosis and treatment. You may have to go for gastroscopy besides other routine tests for confermation.
Wishing for a quick recovery . You can approach me in case of any doubt regarding.