Neck pain and tightness around the chest

Hi From last 6 mnths I have chest discomfort and neck pain . I have consulted cardiologist and all tests related to heart came negative ecg 2d echo tmt all are negative . And I have taken multiple x-rays and nothing found in it . Previously I used laptop by keeping body weight on left hand . Many are saying it is muscle related problems I have used different medications but still the problem persists . I don't know what exactly should I do to find out the exact cause of the issue . And due to this I have mentally weaken and developing  anxiety and panic attacks . Please help me how to proceed further And I have contacted cardiologist Nishant in practo too he also says that you have no heart problem