Maybe my baby is a tummy sleeper?

So my son has been waking up every 2 hours at night for what feels like forever. I try to keep him on his side/back because I’m too nervous for him to be able to sleep on his belly. But right now he has been napping for almost 2 solid hours (which NEVER happens) on his belly. Should I try to let him sleep on his belly at night? Ugh I feel like I’ll be paranoid all night!