The pain may be due to pancreatic diasease that is localized at the sirte where you mentioned pain.
The pain is localized to an area where the junction of stomach and esophagus
that hurts in gastriesophageal reflux disease that can respond to antacids.
It may be due to any disease involving the small intestine
You should have an Ultrasound
abdomen to rule out any major problem
If the Ultrasound report is normal than just take antacids and spasmolytics such as Spasfon for 03 days.
I hope I am sucessful in solving your query If u have further you can ask me
Get well soon
Dr. Azhar Sattar