My daughter is just 2 months old. She has a preference for putting her head towards the right side. While I turn it to the left every now and then, she keeps it there for a short while and turns back to her right. I'm now noticing a slight difference in the shape on the left and right. She doesn't like to use a horse shoe pillow and gets rashes with the mustard seed pillow. Will the shape of her head become permanent as it is now or will it change and get well rounded once she's sitting up and moving around more. I have received mixed responses to this, hence wanted to check.