Hey,
I am sharing a link with you, please go through it, hope it will help you. And do not worry, I, too, faced the similar issue with my daughter, and I did not even visit any doctor as my repositioning her head during her each nap helped. Hope, it helps your baby too.
http://my.clevelandclinic.org/childrens-hospital/health-info/ages-stages/baby/hic-Repositioning-Techniques-for-Infants
Anonymous