One side of breast not yielding as much as the other

Hi all, I’m 16 days postpartum, and exclusively pumping. However realised that lately my right boob is yielding 10-20ml per pumping session compared to the first few days while the other is yielding 80-100ml, is this normal? Also when letdown happen I can only feel it on the heavy yielding boob instead of both boobs. Is this normal too?