I went back to work after two weeks. I did go back part time the 3rd week and full time the 4th week. The hardest part was getting my energy level back. Also, remember, you must not work with anything over 10 lbs for 6 weeks! That is very important, just ask Glen :o). I wonder why you have to wait 21 days to remove the catheter? I did have mine in for 11 days and had no need for pads after a couple of weeks. I am still very curious about your procedure so keep us posted. I am now 6 weeks post and can resume "normal activities" which I think will challenge my bladder again. Rode a bike today with the kids but was careful with the bumps.
As far as being alone during the day, keep your drugs, drink, and remote handy. Get up for short walks and to empty your urine bag. You will be fine alone, just know your limits. You will be amazed how much better you will be feeling after one week! Best of luck to you.
Age:41, Lump found on routine physical. PSA:1.4, 2 of 13 cores positive, Gleason:6, DeVinci surgery on 8/8/2006