'ive been woken up by a horrible pain/tightness in my left shoulder. I'm struggling to even pick up my drink or lie down flat.. it doesn't hurt when sitting still just on movement. It's like a pulling tightness but really quite sore. I'm struggling to lie back down, it feels like something is trapped. On certain movements I can feel the tightness come across the top ofy chest. Really uncomfortable. Does anyone know what it could be? It hurts and I've got myself all worked up and scared its something really bad. Not sure whether I need to call 111 or if it's just muscular.