Branluc, you sound like you're doing fabulously! I'm almost three weeks out from my surgery and I still don't feel comfortable walking with just a cane outside, what a wimp I must be. LOL
Not that I'm speaking from experience or anything but my recommendation to you would be to wait a few more weeks before going back to work, especially after your ordeal. Your body has been through a lot lately, give it every chance to heal properly first. I don't know what type of work you do, I sit behind a desk all day and I don't feel near ready to get back to that yet.