Rolling

When did your LO’s start to roll over? My little guy had his 2 month appointment today and I told his pediatrician that I’ve noticed a flat spot on the right side of his head (which happened from him sleeping at night on his right side because I’m seriously holding or carrying him in a baby carrier ALL day) and the pediatrician said he has Torticollis and referred me to a physical therapist but the doctor also said that when he starts rolling he will more than likely try to sleep on his belly and that will help with getting him off the right side of his head at night.