I'm so sorry you're feeling bad :( It sounds like you might be taking in too much sugar. What I found after my last cleanse is that I was very sensitive to sugars -- so I went to a low glycemic diet. Sugars and carbs are poison to me (thus the reason I'm going back on the cleanse). Orange juice even scares me :) When you go from one extreme to another it's time to take a look at your blood sugars -- do you feel great after eating something...then plummet shortly thereafter?
I don't know if this is the problem or not, but something to think about.