My baby is currently 3+2 days old he is strictly formula fed he was pooping after every feeding however he was Was very fussy I was advised to change his food from similac advanced to goodstart I started his new formula on the 18th he has pooped once on 18th skipped the 19th and so far only once today. Today however was green and a bit watery. Is this normal he has a doctors appointment on Tuesday should I call them sooner? Am I just being paranoid thanks