Baby head shape question

I’ve been holding my newborn baby mostly on my left side since he was born. And I’ve started to get concerned about the shape of his head. So we’ve been rotating holding him on the other side and making sure he turns his head from side to side when he’s laying down for a diaper change or for play time. Well his little flat spot naturally adjust itself as we continue to rotate his head or is it something that we’re going to need to see a doctor for? I plan on bringing it up to his pediatrician when we had him for his two month check up in July.