Anyone else's baby can rollover early?

My baby is 2 months old and has been rolling from his stomach to his back since he was about 1 month. When i googled it said it could be a sign of cerebral palsy. I asked the doctor about it and she said he's probably just strong. Idk maybe I shouldn't google so much...but im really worried and wondering should i get a second opinion. Anyone else's baby rolling over early?