1 month post nasal septal reconstruction, can it lead to an energy boost?

Hello, I had my deviated septum reconstructed about one month ago. As the pain and sensitivity has tapered off and I have returned to work, I have noticed a significant boost in my energy levels during the day, particularly in the morning. I have a labour intensive job and have noticed I am not nearly as tired as I usually am. Can this type of surgery have these effects? Is it all in my head? I'm 33 and I cannot remember when I've physically felt this good. I'm 6' tall 190 lbs physically fit.