Hi! I was also in a panic about leaving enough time for the SWF before work. I have a one hour commute! So when I started I had a couple days off to guage how long the SWF takes to work so I would be safe driving for an hour. I found that two hours is sufficient although the first couple of days I also had to go a couple more times during the morning but not 'urgently'.
Good luck to you! I'm on day 6 and want to go for 20 maybe - we'll see. My tongue is so gross so maybe I'll try to continue with the cleanse until it clears up...if I can. I'm really craving pizza today! LOL! It helps to know that you cant really cheat on this without paying a hefty gastric price. HeHe!