You kick so much butt anyway. I'm sorry you're not feeling well. I did the same thing my first fast, which was only 10 days on juice - I was going through a healing event on a Monday morning and felt HORRIBLE after doing just water that weekend.
Needless to say I made myself some rice and lentils, after having some papaya... And I ate so much of it! Blech.
You'll love juicing, and the ability to exercise at the same time is HUGE!!!!
CONGRATULATIONS!!!!!!! I wish I'd been on the forum more earlier to have seen more of your progress.