When to worry?

ssmb_clarinet

My LO is 12 days old and EBF. I feed on demand and she is definitely an eater! My question is about poopy diapers. She has at least 5 or 6 wet diapers a day, if not more, but she has not had a poopy diaper since Tuesday night, so none yesterday and so far none today. At what point should I be concerned? Her belly does not feel hard and she does not seem to be extra fussy. I have read so many different opinions on this; some say that she should poop 4 times a day and some say that EBF babies often go days without a BM. Which is it? TIA!