My worst symptom (assuming my asthma is under control) is the fatigue and general mental fuzziness. The rest of it is just discomfort, really, to me.

I do think everyone with known allergies who hasn't already done a food challenge should try it. It costs nothing and if you identify some food allergens it can really save you a lot of misery. It's the total allergic load that gets you. I basically manage my food allergies, but when the inhalants are high (and also before a goal event) I clean up my diet, and it makes a world of difference.