SO sleepy! 5 days post-op...normal?

I am 6 days out from my LSH. I still get tired & feel like I ran a marathon just walking to the bathroom.(it is at the other end of the house from my "nest" on the couch) I sleep as much as I can with 3 small kids in the house. My dr said it is kinda like having a baby. Ya know sleep when the baby sleeps so that I should be napping about every 2-4 hours to keep my energy up & help my body heal. Hope you feel better soon! :-)