I'm so sorry you're having such a horrible time with all of this. My husband is allergic to Oranges, Grapefruits and Strawberries. I don't think he could do the Master Cleanse either. Even if he could, I don't think he would anyway. No one can say that you didn't give it a good try.
Maybe you should post about this on the Ask Curezone forum. There are some really smart people who check that board and you might find a remedy to the way that you're feeling now.
I am no expert, by any means, but I have read that iodine can be helpful when you are having food reactions. Prior to trying anything with iodine, or anything else, if I were you I would post on Ask Curezone. Once you are feeling better, you may find some help in selecting a better cleansing route there.
Again I am so sorry you feel so bad. I hope you feel a lot better very quickly.