Left hand , arm and shoulder pain.

  i felt left hand shoulder and arm pain which was going in left back as well i went to hospital and they did ECG with CPK , CK MB & Troponin-T blood test which came normal but CK MB was little increased.   when i was not satisfied with above hospital then after 2 hours i went to Escort Fortis Delhi hospital in emerhency and they did ECG and all repated above blood test by own lab and the blood test resulet came negative like this CPK 242, CK MB 2.1 Troponin-T 6.7.   Next day in OPD doctor did ECO and TMT test and it also came negative.   but still today i feel pain in my left shoulder and arm ( without sweating , no chest haviness and no pain in mid of chest) and sometime it gose and come.   Is it haert issue?