Rolling

Hi all so the last 2 days my LO has learned to roll on to her belly but she can’t do it properly yet she gets her arm stuck underneath her. Well I woke up this morning and she was lying on her belly in her cot asleep I’m so paranoid now that if she gets her arm stuck under her she won’t be able to breath properly. Any tips or has anyone else gone through this I’m so worried and defo not gonna be sleeping for a while