Hello. FTM here, my son is about to be 4 months old on the 11th. His pediatrician wanted him to be rolling from belly to back by now. My son has done it a few times, but whenever we do tummy time he completely hates it. He's good for maybe a good 2-4 mins, but he won't roll anymore. He does keep his head up though, but when he gets mad he puts it down. He loves his tummy time mat with the toys, but only while on his back. Any tips ? And also when did your baby start rolling? I feel like we haven't accomplished it (the rolling to his back) and it stresses me out a bit.