You are being treated for heartburn or hiatal hernia, and you feel sudden chest or stomach pain, have difficulty swallowing, are vomiting, or are unable to have a bowel movement or pass gas; you may have a hernia that has become obstructed or strangulated, which are emergencies.
One strong possibility for your symptom is gall bladder stones and cholesterol deposits within the gall bladder which can cause sharp pain. Getting an ultrasound of the upper abdomen done in a walk in clinic or the ER will confirm the diagnosis.
A gallbladder infection or gallbladder stones may cause right upper quadrant abdominal pain. The pain may also be felt in the central abdomen or wrap around the ribcage to the back. When an infection is present, there may be a fever. Abdominal pain associated with the gallbladder may occur more often after eating.