Baby rolling onto side

My son is 14 weeks and last night was the first time he started moving onto his side. He usually does it when he wakes up in the middle of the night and is hungry. He moves around a lot and it looks like he uses all his power to move to the side. I stopped swaddling three weeks ago so his hands are free but I’m nervous. I didn’t get any sleep last night because I was scared he would move onto his stomach. I can tell his arm blocks him from moving all the way to his stomach. He does pretty good with tummy time but I’m still nervous. He sleeps in his crib, he never liked the bassinet and I use a baby monitor. Am I just being a worrywart?