3 month old sleeping face in mattress


Hi everyone, for the past few nights my husband and I have been waking up to our 3 month old son sleeping on his belly with his face down in the mattress. (He’s able to roll from his belly to back and vise Versa). It’s absolutely freaking us out and we’re barely getting any sleep at night even though he’s an amazing sleeper. Has anyone ever dealt with this or have any advice??