As I mentioned earlier, C has started rolling onto her belly in her crib and getting stuck. Sometimes, she will fuss or cry until we flip her over (multiple times, rather annoying). Now, sometimes she will fuss for a few minutes then fall back asleep on her belly. Since she can push up very well on her arms, and hold her head up really well, is it OK to just leave her if she's fallen back asleep and isn't bothered by it? She's 4.5 months. She has rolled from tummy to back while she's awake but not consistently.

Yesterday we pretty much accidentally let her do it, because we were out and didn't have the video monitor. I came in after her nap to her smooshed up to the side of her pack and play on her tummy.