HELPPP MEEE!!!

As I have previously posted, Greyson is rolling over now. He is very good at rolling from his back to his tummy, which the Dr. tells me is harder for them to do than tummy to back, BUT he can't seem to figure out how to get from his tummy to his back. The hard thing is that now he has started to roll over in his SLEEP. And that means that he gets upset and wakes up crying because he doesn't like to be on his tummy so it wakes him up MAD and he can't just roll back over so I have to keep waking up to go in and roll him back over to his back! So, I am extremely tired...I thought yay! we are sleeping through the night now but now, I am getting up like 5 or 6 times a night to flip him back onto his back. I have tried rolling blankets up and wedging them beside him so he can't roll but he finds a way somehow...So, what's a tired mommy to do???
At least he is so very cute...Hopefully he will figure out to roll back over soon or learn to like sleeping on his tummy!!!