So I was completing the Golden Claw quest and had just got the Golden Claw from Arvel's corpse. I don't remember if I quit or just left the game running, but when went back to the game I found that I couldn't sneak anymore! My character appears to be sneaking, but when I press Ctrl, he does nothing and the sneak crosshairs don't come up. I tried changing the key for sneak to something else, but that didn't work. What could be the problem?