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.
For example, in the McMurray test, the doctor bends the leg at the knee, and then rotates it inward or outward while straightening it. If you feel pain during this test or if there is a click sound as your leg rotates, there is a good chance that your meniscus is torn.