I’m dealing with a similar thing with poultry right now. If I eat it too frequently, it gives me ridiculous, flu and allergy-like symptoms. However, now that I’ve basically eliminated it from my diet, I can eat it on occasion without much issue.
It took me forever to figure out because poultry is often a filler meat.
I am very close to the same conclusion. Every time I travel, things return to normal. I always eat chicken at home and never when I travel. I tried eliminating everything else I could think of because chicken was such a reliable staple for me for so many years. My symptoms seem more mild. mostly GI and not much systemic presentation
It took me forever to figure out because poultry is often a filler meat.