My friend used to drink heavily, he had developed pain in the stomach which was going to the back once.. He was so restless in the bed.. We initially thought that it was a simple pain some thing like gastritis. But after almost 6 hrs we finally decided to take him to the ER... The doctors said that he had pancreatitis and was hospitalised for a week... So do not take a chance,... Get it checked if the cause is not a pancreatitis or a gall bladder stone that needs to be operated, especially if you do consume alcohol...