Is it COPD, Asthma or Pneumonia? How Can You Tell?

How does your doctor go about figuring out what is wrong with you and arrive at the correct diagnosis? Let's begin with a story, something that happened to me not long ago: “Well, it’s one of three things,” said the doctor. It could be caused by a medication, it could be Adie Syndrome, which could go away anytime or you might have it forever…or it could be a brain aneurysm.” I lost it, broke down and cried,...