Sleep regression already?! 😞

dani
So I don't want to get grief for what I'm going to post just looking for ideas and tips! My little guy is 3 and half months and just started rollover and it has been at night when he does it! Yes yes I put him on his tummy to sleep! In my sleep deprived state early on I put him on his tummy and he slept amazing so I have kept it that way. Well we are now rolling over and it wakes him up. So do I just let him be to figure out how to sleep on his back or do I put him back on his tummy! He did it twice last night and then when he was napping today. I feeling exhausted again and he is one to not nap well either!! I should say before he was rolling over he slept 12 hrs with out waking. Any tips would be greatly appreciated