My baby is doing the same and it’s almost 3 weeks as well (on Wednesday). My pediatrician told me it was normal for him to have loose stools. I’ve been worried but I’ve been told that breastfed kiddos or kiddos missing breast milk and formula May do this.
I’m trying to just go with it for now. Let me know if you hear anything else. My lactation consultant also thinks it might be the formula my little One is on. And others say it’s just their digestive system Catching up and getting stronger.