Milk supply day 4

Cierra • Mom of boys! 💙💙

Hi ladies. Is it normal for milk supply to not be all the way in on day 4. I know it says 3-5 days usually, but I didn’t have an issue with supply with our first one (not sure about in the first days) but I’m panicking a little about only 40mls from a 25 minute pumping session 😩