Talk to Orthopedic Surgeon on Pain In Back Side Just Behind Heart

aslam o alykum. I am feeling pain in my left uper back, just feel like behind my heart. during prayer when I went in sajida, I feel heavy in my left shoulder and back. pain also move to shoulder join and also in elbow and back side of arm on body movement. I have no accedent. no shugar. I also did my x-ray which asked by ortho surgen.he did not any thing. he gave mi osam d complex. musle relaxant. but it does not feel right because I still have on going pain. I need advice and whome I should now consult?