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.
If the intercostal muscles on the right side are affected, the affected individual is likely to experience pain under the right rib cage. Rapid twisting of the torso can cause an intercostal muscle strain, which in turn, may cause painful breathing and soreness.