bananagirl, ask your doctor about
metametrix complete GI stool testing. On the website you will find it, and my doctor just quoted me $99 bucks instead of the $349 it was last summer! I will be doing it again, because I feel i'm in a 'remission'.
This is an interpretive guide, (regardless of whether you have, or will take the test, i think everyone should read this!)
www.metametrix.com/files/test-menu/interpretive-guides/GI-Effects-IG.pdf -symptoms, causes and treatments for diagnosable gut-related ailments!
This test really helped me out. After supplementing since last summer's results, i'm in a better place because I know my issues were partly digestive related and needed to be tackled. The testing kit is simple. You poo in a container, use 'grabbers' to select parts of your poo and put in these small viles, then send it in this included discrete packaging through Fed-Ex. It's the most disgusting and disturbing thing I've ever done and now written, but well worth it. :)
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On another note, I don't understand why some of you needed GI doctor's notes to do allergy testing? If you go to an allergist and just say I want to have testing done, they will just ask for your insurance. =/
Diagnos-Tech is another good lab to look for.