Although I don't know any specifics, I just wanted to let you know that I have heard of what you are referring to. There are those who believe that some people are so sensitive to yeast or foods that contribute to an over-growth of yeast in the body, systemically, that it causes the feelings you described. Years ago I remember seeing a book on the subject. That might be your best bet if you want to go down that road, or maybe a Naturopath (I think that's what they're called) or a nutritionist might be more informed on the subject and more inclined to work with you on it than a "regular old MD."