My LO sleeps on his tummy (have been since the day he got home).. now that he is almost 5 months, he has been learning how to flip from his tummy to his back.. I wouldn't mind if he does it when he's awake but he has been doing it in his sleep. Last two nights he would flip every 2-3 hours and end up awake cos he can't sleep on his back.... anyone knows what I can do? I'm feeling the lack of sleep now since he has been STTN since 2 months old...