SOMEBODY PLEASE HELP ME. MY LEFT SHOULDER IS KILLING ME. (A THROBBING, ACHING PAIN); IT HAPPENED OUT OF NOWHERE. THE PAIN IS USUALLY 4/10, BUT YESTERDAY NIGHT IT WAS 8/10. IT SOMETIMES DOESN'T HURT, AND THEN COMES BACK OUT OF NOWHERE. IT'S BEEN LIKE THIS SINCE THANKSGIVING WEEK STARTED.