My 5 month old just started rolling from her back to her tummy. She loves rolling and for two days will roll over and over again but she has not mastered tummy to back rolling and becomes uncomfortable and frustrated while on her tummy- including while she is trying to fall asleep and in the middle of the night. I do not want to use a wedge or anything else to prop her. She moves a lot throughout the crib and I don't want additional things in her crib. She already sleeps in a sleep sack and that does not deter her. But what should I do? I'm feeling hyper vigilent staring at the monitor all night long when she wakes up.