5 month old co sleep

Soo i have co slept with my 5 month old since he came home from the hospital now he tosses and turns flips and rolls every direction. Its time for him to go in his crib but hes rolling and im terrified of his suffocating just because when he lays he doesnt exactly know how to turn his head to sleep and most of the time is face down. Will he just automaticly know to turn his head when he sleeps? I feel so much aniexty with him i just wanna watch him sleep all night!