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.
The biceps are the muscles just below the deltoids, and usually show signs of pain when you extend the arm out straight. The triceps are the muscles opposite the biceps on the underside of the arm. These muscles can show signs of a pull when you bend the arm at the elbow. The brachioradialis muscles make up muscle group in the forearm. Often, these muscles show symptoms when you are trying to lift something, bending the wrist, or experience injury to the elbow or wrist.