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.
Lachman test: flex the knee only 20-30 degrees (rather than 90 degrees in anterior drawer sign), then attempt to pull tibia anterior relative to the femur. If positive, a deficient ACL will demonstrate increase movement forward. This test is thought to be more sensitive than the anterior drawer sign. Attempt to hyperextend knee by placing one hand superior to the patella and the other posterior to the heel. More than 2-3cm (i.e. able to place one or two fingers beneath the heel when leg is extended and flat) is abnormal.