Lets call a spade a spade shall we? This is a forum with self professed reasonable people. The reaction could be anything from tile cleaner to toilet cleaner or an allergic reaction to bread.
Or, honestly, simple anxiety. I went through a year of severe anxiety where I honestly thought I was suffering extreme cardiac and maybe neurological symptoms. It turned out to be all psychosomatic. There are so many markers of similarity between this article and my experience. "Fainting spells, chest pain, numbness" were all part of it, and more.
