Oh my! I imagine that cant be good, especially if shes red in the face. Caleb often falls asleep with his bum in the air (hes a tummy sleeper) i just wait until i know hes in a deep sleep and move him, if he does stir he goes right back to sleep. I would try tummy sleeping, it might deter her. Im interested to hear your progress though, have you spoken to your Dr about it?