Please accept this in the spirit in which it is intended as I genuinely feel for your plight having suffered several inexplicable debillitating ailments. You seem to have addressed all physical medical assessments. I strongly encourage you to schedule a consult with a psychiatrist to rule out non-physiologic causes. When my general practisioners couldn't figure out what was causing my problems, they referred me to a psychiatrist, which infuriated me at first, but I went and he ordered lab tests which revealed I had physical problems, i.e. hormonal deficiencies, NOT mental or menopause related, which were wreaking havoc with my life. I have had a lifelong problem with depression, and the blood tests revealed my body does not produce seratonin and I couldn't be happy if I wanted to. He prescribed an antidote, and my life has literally been transformed. You owe it to yourself to find out if someone thinking outside the box might be able to help you identify the cause of your food allergies.
Best of luck to you.
I had these types of reactions, mostly the breaking out, since I was an infant.
Stress can aggravate allergic responses, that is true, so mental attitude can play a role in the severity of the reaction.
However, the problem is, I will be going along, happily eating something that has hitherto been safe, and within a couple weeks, I am clearly reacting to it and it goes on the don not eat list.