The next step in answering my questions, and hopefully feeling better, is a methacholine challenge test which I am having done on Wednesday. Have any of you ever had this test done before? I read online that it is very physically challenging. Just a simple pulmonary function test kicked my butt. Just wondering how bad this one will be. I am not (obviously) enjoying this quest for answers at all. I would just really like to hear that this isn't going to be as bad as I am anticipating.