I am now on day 17 and think I'll probably go to 21 and see how I feel... at this point I'm feeling excellent!
As far as continuing the swf and tea post-fast, uh-uh. You want your digestion back to normal, functioning on its own without crutches!!! Save the extras for fasting times. Eat plenty of fiber, drink lots of water and you won't need any help.
My wonderful naturopath has me add 1 tsp. metamucil (like baby food psyllium) 3x daily with lots of extra water until digestion reestablishes. I only need this after a long fast.