Hi nana2mo,
I'm sorry you're having such a tough time with energy. I also had my surgery on 12/26/13. I had a 3 day hospital stay. The first 3 days I was pretty tired, but since then I have been fine and able to work out. I had three friends that had this surgery and all of them said that at first they were very fatigued. I assumed I would have the same severe fatigue, but surprisingly, I've been okay. I am just really struggling with getting in enough Water every day.
I hear the fatigue is absolutely normal, but if you're worried check with your doctor.
I hope you feel better soon!