Rolling over

My 4 month old has just learnt to roll from back to front, but doesn’t yet know how to do front to back. Had this happened to anyone and how did you deal with it?

She keeps rolling over in her cot and I’m paranoid I’m not going to notice and she’ll be stuck all night or something. Usually she cries when it happens but she sometimes wakes and cries for 30 seconds before falling asleep again, so I don't usually jump up at every noise.