How to stop worrying about sleeping baby?

My baby is 7 months. She just learned to roll from belly to back last week and is getting pretty good at it. She has been doing back to belly for longer. I moved her from her bassinet to her pack n play with bassinet insert because she was getting too big. Now that she has more room in the pack n play, I’m worried she’ll roll over while she’s asleep. I’ve seen that it’s ok, but I still worry. Any more experienced moms that can offer some advice?