Daily pain in left jaw/should/arm. Mult ER trips n seen Cardio for chest pain etc in past. Neg Ekg, blood work, n 48hr holt. Lots of worry. Insight?

Pain. There are many causes of chest pain, the heart is one, intestinal gas and thoracic musculoskeletal pains are very common, anxiety and panic attacks likewise are frequent causes. You should always ask the doctors who see you what they think is the problem you came for and what to do about it. Yours sounds musculoskeletal perhaps intercostal muscle spasm.