I don't know whether this will help but it helped to explain my issues. It isn't exactly in the news that a lot of foods in our diets can contain the heavy metal cadmium. Prior to my discovery of my allergy to gluten mine was wheat. Grains seem to love absorbing cadmium and I made the mistake of switching to rice, another grain high in cadmium. Unfortunately, I also had the added issue of working in a glass factory, with cadmium used as a colouring of the glass emitted in gaseous form during production. I've been surprised by the range of issues such seemingly insignificant exposures can cause, including shortness of breath.