In the past week I have had two severe allergy attacks. One I ended up in the er and was given an epipen so was able to use it. I had allergy testing and am allergic to every grass, tree, weed, dust mites and dogs and cats. The doctors can not find what is causing this severe reaction and it is scary because I never know when it will happen. Has anyone else had that problem where something could not be identified and what did or do you do?