Our daughter has been sleeping in bed with us the past week or so as she has been reallysick with the flu and crying all night in her bed, but I have noticed while she sleeps that she grinds her teeth! I am worried she is going to hurt her teeth, I don't know how long she has been doing it for. She never does it when she is awake so I don't understand it, but my gosh that is one of the worst sounds to hear! Any way to stop her, or will it pass maybe?