Hi firstbub! My DD#2 is almost 8months and actually prefers her side and tummy. Although in the beginning I was concerned myself for the same reasons. Can your little girl roll back and forth when playing? If she can then she should be fine in her cot. The other thing that gave me confidence re: my DD was when I watched her play and she'd roll onto her tummy, after a while her neck would get tired and she'd lay her head down on the side. If you are concerned, I have heard of anti roll pillows but some mums have found that their little ones can roll over the top of them or push themselves up out of them cheeky rabbits! DD does every now and then get stuck on her tummy but I think its when she wakes up and is too tired to work out what to do next but she knows she just doesn't want to be on her tummy at that moment Not sure if any of this is helpful?