How do I️ reposition baby’s head?

Sav

My daughter loves to lay on the right side of her head. I’ve positioned her head on the left side when laying her down but she always turns the other way. I️ tried rolling up a receiving blanket and putting it on the right side of her back. But she still turns her head to the side. I️ don’t think she has torticollis but I️m not a doctor so idk. Does anyone have any tricks to turn her head so she doesn’t get flat head syndrome?