Fluid build up after C-Section

So I wear an abdominal binder given to me by the hospital daily. Am I wearing it wrong? I am 3 days post partum. I noticed today that at the bottom of my tummy is all fluid and the top part is hard.

My feet and leg also swelled 2 days post partum. I haven't been moving around alot because we are still adjusting to the baby's feeding schedule.

Is this normal?

Edited to add: So I googled and found out it is Post Partum Edema. However I haven't come across anyone with fluids in their stomach. Just the feet.