Constipation Issues

My 2 month plus boy who is generally on Breastmilk except for night feeds where he is on formula has not taken a poop in 12 days. I have read and it has been said that it’s rather normal given that he is still peeing normally and drinking although he has not been drinking as much as he usually does over these 2-3 days which is understandable. Do I need to bring him to the doctor?