When you said Norco, I thought you were talking about mountain bikes.
Where else would anyone think this?
Of course you are exhausted. You are up and walking less than a week after surgery. It's hard for us to imagine the metabolic energy it takes for healing to occur.
I remember one day about 10 days after my second son was born, I had to drive to my school to pick up my paycheck. I was on the freeway, and all of a sudden, I thought I was going to have to pull over and call someone to get me. It's the only time I have felt that kind of exhaustion, and that was after a natural birth, with no drugs. I can only imagine what you are feeling. Nap all you want.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport