I really feel you on this, it is something I thought about a lot when my baby was tiny too. We were actually quite worried about the same thing and a friend of mine tried the Mama's Choice Flat Head Prevention Pillow and said it felt firm enough to give good support without being too hard, and her baby seemed comfortable sleeping on it through the night. That said, if you ever notice your little one's head shape changing, it might be good to bring her to see the PD just to be safe, because every baby is different and the doctor can give you the most accurate advice for your child's specific situation.