Hi.. The pain in your chest back and arm area could be originating from your neck. If upper neck bones are not free to move enough then there will be associated tightness in the muscles connecting neck and shoulder...which might be referred to chest and back if untreated... It is not necessary that you should have pain in your neck as well, you might have stiffnessc sometimes... If I were your treating doctor... I would like to examine your neck for intervertebral mobility and find out the facet joint or nerve getting irritated..... Mobilise your neck muscles and improve intervertebral mobility... I would recommend you to Keep icing your neck shoulder area especially around side of the neck... shoulder frequently... Gently knead the area to make out painful area over neck and shoulder and concentrate on kneading those areas... Keep your neck supported while sleeping... Maintain posture while working... especially if you happen to do desk job..not to bend too much time take frequent breaks.. Ergonomic adjustments to be made to workstation to avoid prolonged neck bending... Gently stretch the neck and shoulder... to receive spasm and regain length of the muscles... If you have a Anti inflammatory medication prescribed to you earlier then have them for 3 days... Take rest.. Avoid lying on the affected side.... shoulder... Once pain reduced you can start with neck isometric exercises...abd shoulder strengthening.... Hope this is helpful for you... Kindly revert back incase you need any further assistance....