Day 3 = YUCKO!!
yes I think it's pretty normal to feel weak for a while. I started getting a little energy back at about week 3 and went back to work week 4. I had surgery 9/12 and just this week starting to feel close to 100%. Take it easy & rest as much as you can. Glad you are not having much pain though=that's a plus. You'll probably feel pretty tired for at least a couple of weeks but I guess that is different for every one!