welcome to hcm.
it would be very informative if u could mention what was the food item that you consumed.
as per the history, it looks like food poisoning
and I would suggest you to avoid milk, coffee, alcohol.
Avoid all junk foods, non vegetarian foods and sour fruits/juice.
Chewing gum wont help u in this regard.
U can take curd rice and fresh fruits and home made vegetable soups.
Kindly take 3-4 litres of boiled and cooled water every day.
If the pain persists or appears, u can take tab.Buscopan
1tablet only SOS and not more than 3 tabs per day.
20mg would be a better alternative to Ranitidine