Rolling

My LO is 13 weeks tomorrow and the last 2 days he has started to roll to his side. I have started transitioning him out of a swaddle because of this. He sleeps through the night but i still wake up randomly to check on him. Last night when i woke up he was sleeping on his side, i rolled him back onto his back but he went straight back to his side. So there i sat watching him because I’m nervous. Is anyone else’s LO doing the same? Is it ok that i let him stay on his side?