Might I suggest that you could be allergic to mold (as in mushrooms)? I was having a hard time when I started low carbing because I drastically increased my intake of aged cheeses (cheddar, parmesan, brie, etc.) as opposed to fresh (mozzarella, feta, string). If I eat a caesar salad and the mold count in the air is also high, I get reactions like your'e talking about. I stay away from mushrooms for the most part. Being totally overloaded becomes an ongoing problem if you're eating this stuff in greater quantities.

Just a thought...