I'd suggest staying away from everything bread and everything with a high sugar content that leads to irregular spikes in your blood sugar. Plus most breads and grains are so overly processed, it's ridiculous. You might as well be eating flavored paper.

Hi...absolutely.
With you it sounds like high glycemic foods( lots of carbs or raising blood sugar too quickly) can cause a reaction. Some people are sensitive to corn. My friend is allergic to anything containing corn products and gets huge hives. Try eating more protein or protein combined with carbs.
For me, dairy and certain fruits like banana avocado and kiwi seem to cause either small itchy spots or a reddish blotchiness on my chest. I try not to eat them. Food allergies suck.