Welcome to Healthcare magic.
if it is a gastritis or a peptic ulcer
pain which are very common causes of abdominal pain
, you should have got at least some relief with ranitidine and food intake.
Since there is no relief, i would advice you to visit your doctor's office to rule out conditions like pancreatitis
A clinical exam and certain blood tests, ultrasound scan may be needed to come to a conclusion.
I wish you a speedy recovery.