Best advice I ever received from a paediatrician: there are only 3 "bad" types of poop in an infant. White poop, (possibly indicating that baby is not producing bile and not digesting anything), red poop (indicating fresh blood/bleeding in the lower bowel), and truly, pitch black tar-like poop (possibly indicating bleeding higher up, perhaps in stomach). Every other shade of green, yellow, brown and beige, runny, seedy, lumpy, smelly, is all totally, totally normal. I have very much needed this advice because I have a natural tendency to "read" nappies like a mystic reading tea leaves. And my anxiety levels have been tested by EVERY type of poop over the years. My eldest has even had to see the doctor with (at different times) bouts of absolutely white and absolutely black poop. Even then, she was completely well, nothing wrong with her at all. Just a mysterious, short lived little hiccup of some kind with her quickly growing insides. Babies' insides change every single day. The environment they are in, the germs they breath/ingest, change every day. Their guts are not going to produce regular poopies of the same consistency, colour and smell every day. You are breastfeeding, which is great for your baby. Just keep it up, and try to focus on reliable indicators of health - like is your baby developing well and gaining weight bit by bit, at his/her own pace. Don't read nappies, ever, is my advice. Just chuck 'em in the bin.