Have you done a challenge diet? I'd be surprised if wheat is the only food you're allergic to. The propensity to allergies is part of our biochemical and genetic makeup, but specific allergies develop in response to exposure.
And have you been tested for inhalant allergies? It's possible you could have the fatigue and edema without a whole lot of upper respiratory symptoms.
I don't have any experience with the rest of it, but plenty of experience with allergies of various kinds.