Off balance while walking

I think your body needs more rest than you are allowing it. I'd like to say I could be back to work after the 2 weeks, but that 3rd week of healing makes a big difference on your recovery. I don't have any idea if that is causing your feelings, though - it's just my thoughts on it.

I was so drained up until the 4th week, I could not even imagine working my desk job.
It sounds like your body is just tired because its using all of its energy and resources to help heal you!
You are probably still on a bit of a limited diet too, and any lack of calories could also contribute to your energy level.
Just try to rest and sleep as much as you can.