Baby rolling at night no sleep

Hello everyone :) my son was born may 7th. He has been rolling into his belly since he was like 2 months old.. whenever I try to put him in his crib for bedtime he always rolls on his back and starts crying... I flip him back onto his back and he does it over and over again! Eventually I get so tired I just bring him in my bed and he sleeps with me.. I put my arm there so he can’t roll, and he sleeps fine in my bed. Have tried rolling up blankets to put as barriers and they don’t seem to work.. anyone else have this problem? How do I fix it lol