Belly rolling

Nolan has recently figured out how to roll from his back to his belly. Good for him but bad for me. He's always hated being on his belly but he's starting to come around to it. Very slowly. Now, I'm already a worry wart and check on him at night, but last night was out of control. He went down for bed at 9:30. Between then and 1 AM I was up and down 5 or 6 times to flip him over. He would roll over in his sleep and after awhile of sleeping like that he would FREAK OUT and start wailing until I picked him up and rocked him back to sleep. OR he rolls over and somehow manages to scoot himself into the corner of the crib and smoosh his head into the rails. He better figure out how to roll BACK soon. Or else