Possibly you had gastritis
. was it associated with burning in stomach or reflux or vomiting
or was the pain in upper part of stomach if yes then it supports the diagnosis.
If the pain is severe and associated with backache
and vomiting could rarely be pancreatitis
especially if you have had a binge in last four to five days (looks unlikely).
Worthwhile taking an course of an antacid like omeprazole
20 mg twice a day for 5 days and see if you did not have any of the above mentioned symptoms and if pain was mild.
Hope this answers your query.
wish you a speedy recovery..