oooo i did that on a bmx, i was stupid though and didnt wear any protection...woke up in hospital i wish i had a picture of my shoulder sounds like you did what i did! i had the EXACT same problems with it as you but the pain ran across my chest aswell,
being pretty gross but can we get a pic of your shoulder
gotta luv the wounds man, hope it gets better soon either way
p.s mine took a good few weeks to heal up......i had pulled the muscles in one side of my neck and the ones on my back, very painfull