iWantToLive, I'm so sorry that you're going through all this!
Why don't you ask your doctor about
drinking an elemental diet? It would involve drinking a predigested shake that would be absorbed into your bloodstream within 20 minutes of consuming it, giving most of your digestive tract a much needed rest. The shake apparently contains no food allergens.
For more information, go to: http://www.medscape.com/viewarticle/731955_6
Although I'm afraid this probably will not be an option for you, considering the complexity of your situation.
I really hope you get better!