Hello! I Am Currently Experiencing Pain On The Right Side

Hello! I am currently experiencing pain on the right side of my neck, but not the type of pain I would feel with a pulled muscle. The pain has been ongoing for the past couple of hours and has since shifted downward underneath the inner side of my right collar bone. It was at first a sharper pain and has turned into a dull constant ache with occasional sharpness. I am wondering if I should let this pain work itself out or go to my local ER or clinic.