Lots of good info already! I will be 4 weeks out tomorrow. Went in Tues. for 2 hours to schedule some clients, and will return Monday 3 hrs per day/2 days a week. I was VERY tired after Tues - shower, dressed, walk from the parking lot, work, walk back, home, made lunch). I dealt with about 3 weeks of nausea that increased my fatigue as I was not eating well and lost 10 lbs, otherwise I think I would have better endurance.