alergic to cooked beef?

could it possible that I am alleric to cooked beef? I don't know what it is exactly but I have been sick feeling for the past few days,first it was rice- then I had eliminated it,felt better but still a lingering bad feeling.I can't think of anything else other then cooked beef.This is the first time I have ever really eaten fully cooked beef,most of the time in the past it was at least medium rare but now it's fully cooked.I am rashy again,have brain fog and insomnia.My insulin seems to be kinda low as well.This really sucks because beef is my prime source of protein though I have nearly cut it out while on a parasite cleanse.

now what????