concern about babies poop

Christina
My son is almost two months old
On Wednesday. He has had 3 different color poops today. All three are a foul smell. First one was light yellow watery with mucus. Second what a brown watery color with mucus and last was dark green watery seed. Should I be concern? I'm such a worrie and hope my little guy is okay. He's not cranky at all. Happy as can be and is eating normal with no problem.