I too am corn-free. I've never had an allergy test done, but I know from experimentation that life is just better without it.
I find that it's a blessing in disguise in some ways because it keeps me from eating most processed foods since, as I'm sure you know, it's in almost EVERYTHING!
I wanted to reply because I wanted to pass along a piece of information that I heard somewhere (a lecture by Dr. Pam Popper, I believe). She said that some people with soy "allergies" actually have *GMO* soy problems, and when they switch to organic (and hence non-GM) soy, their problems go away. I don't have any further evidence, and I haven't experimented with it myself yet, but since non-organic corn is almost always GM, I wonder if it's a similar situation as with soy. One day, maybe I'll try eating some organic corn and see whether it bothers me.
I just thought I'd pass that information along, even though I don't really have any further information on the subject. Maybe organic corn, or whole organic corn, might be okay for you...?
Philippians 4:13 - I can do all things through Christ who strengthens me.