I"m going to live
I got checked out today by an allergist. He said that I have "exercise-induced anaphylaxis". In a nutshell, running almost killed me. Actually, its running too soon after a meal. I guess that there are some totally normal foods that you can eat all the time without a problem. But if you exercise too soon afterwards, they become part of a deadly allergic reaction. Happily, all I have to do differently is allow two hours between my meals and my exercise. I also have an EpiPen to carry around now so I can hopefully save myself.