Baby rolling in crib

So my baby is 6 months old and she’s been sleeping in her crib since she was 4 months old but recently she’s been rolling on her belly and going face down in the crib and it’s got me so paranoid that she’s going to suffocate... is there anything I can do to stop her from rolling on her belly? I know they say it’s ok for them to sleep on their belly’s at this age but she doesn’t turn her head to the side like most babies do and she just lays face down her n the crib 😭😭 so scared she’s ganna suffocate