Re: Lilly's not pooping!!
A few weeks ago mine all of a sudden stopped pooping. Asked the doc at a weight check and he was not at all concerned. They pooped a week later. It is COMPLETELY normal for their pooping schedules to change. Breastmilk is much more easy to digest. Sometimes they are able to use everything that's in your bm and have very little waste.
Only be concerned or do something if she's having hard poops. There are things to try to get her to go, but I would suggest just letting nature take it's course.