My baby girl is 3 and a half weeks old. (Warning! graphic poo description coming up...) She has been doing the normal runny mustard yellow poos once every two to three days for a couple of weeks now. Today her poo has taken on a greeny tinge (still the consistency of cream but more green than yellow - no bits). She also sounds as if she could be getting a bit congested in her nose. Should I take her to the GP or is this normal?