Recently, M has taken to sleeping longer stretches. While this is awesome, I'm having an engorgement problem come 4am. She eats around 5 or 6pm and then again at midnight. At the midnight feeding, she only eats from one side. That means at 4am, I am in pain on the side she didn't eat from.

Should I pump the other side after she eats? Will my body figure this out so I won't be so engorged at 4am?