gah! I feel for you all! I woke up this morning and couldn't turn over as the righthand side of my back was so painful. I don't know if it's a muscle spasm or something else, because it was fine when I went to bed. Now I can't sneeze without groaning, and breathing in deeply is a nightmare. I didn't believe my friend when she said she'd cracked her rib turning over in bed once (I figured she was doing a bit more than turning over!) but bleedin' 'eck, whatever I've done, it's sore.
gnome2636 - I don't think it takes much at all to crack a rib - another mate of mine - a bloke - managed to do it while attempting an inebriated cartwheel and landing awkwardly.