My shoulder and side of my neck hurts when I run?

um ... neck has to do nothing with running, maybe its ur bed, maybe u've been moving ur neck a lot recently etc and when u run the u just feel the pain because ur body is in fast movement, about the shoulder if you drive you're shoulders so wide while running its natural they will hurt, next time make sure ur arm is not fully extended ... ur elbow has to be bent as if you were holding a cup on ur belly level and dont swing wide with arms while running, actually swing in a less wider range but faster( it will make u run faster)