Yep we had the same happening here, DD saw my chiro a few times, who also recommended a special pillow (google lovenest baby pillow) that we used for a few weeks. It can only be used up til 4 months of age, but it certainly helped (well I think so anyways) Prior to that I would turn her head to the left when she was sleeping, playing etc but she just favoured the right side and always turned back to it. HTH