@abelsmama, @hellosweetie thank you ladies for clarifying. I had no idea about it

Agreed with above, it releases oxytocin and other hormones that cause you to be sleepy...when your lil one falls asleep and isn't nursing anymore it prob wears off and you don't feel the effects anymore unfortunately

Breastfeeding releases certain chemicals in your brain. They make you sleepy, and some Moms will even describe it as a high.