from what I've heard and from surgeon materials, 7 weeks is the usual amount to wait after surgery to resume work. (more for weight bearing work)
My surgeon says 3 weeks with the pillow/doughnut, so doubling that to allow the suture lines to heal and swelling to reduce would be the minimum, imho.
(that and because dilation eats away at whatever time one would otherwise have for anything else, waiting until that is one less a day will make work easier because there isn't disruption to sit on plastic for 15 min)