I have a tingling and warm sensation on my left side and rapid heartbeat.  I keep belching and I have neck and shoulder pain as well.  There is also a tender spot on the left side under the rib cage.   And my left arm hurts.  Went to the emergency room and they did an ekg and it was good and the chest ex-rays were great as was my blood pressure.  what could this be?
Hello! Welcome and thank you for asking on Chat Doctor! These symptoms could be related to gastroesophageal reflux or musculoskeletal pain, including costo-chon Chat Doctor.  I recommend performing some other tests