Lisa,
I am thinking back to when I was about 6 weeks. It was a very frustrating time, it's been a while and we are all more than ready to be back to normal!
The lack of sleep still bothers me, I don't know if it is my knee or a bad habit that has developed or my age.
Hand tough, there should be a positive increase of stamina, and how you feel soon! I feel like at about 7 or so weeks I started to turn a corner...I will admit, I am ready for another leap in activity, strength and lesson stiffness and or pain.
4/1/2014 TKR