When I told my regular doc that I had been having increasing shortness of breath over the prior year or so - he took an x-ray and an oxygen count of my blood and told me that there was nothing wrong with me. When I asked for a pulmonary function test - he reluctantly passed me along to another doctor who walked into the room after my test, looked at my folder and said "Oh You're the one that he told me about! - There's nothing wrong with you". Then he proceeded to explain that my 15% reduction in lung capacity was within range of normal and that I should see a psychiatrist. I took this little insult calmly and asked if there was some medication he could give me in the meantime that would help me when I find myself struggling to catch a breath. His answer was af flat-out "no". In desperation I went to a drugstore and bought a bunch of over-the-counter congestion drugs and discovered to my amazement that within 30 or so minutes of taking a guifenesen/pseudoefederin combo - my symptoms were greatly relieved. I was later diagnosed by a different doc with having an insideous Chlamydia pneumonia infection.