Okay, this will kinda be a breif medical history to explain. I was diagnosised last November. About March possibly of that year I contracted Bronchitis and a cold, I did have trouble breathing during this time only, but since it came along with a fever they diagnosised it as bronchitis. This is the only time I went to the doctor for a breathing problem. In November I went to the doctor for a yearly physical required by my school to participate in sports. I had a bad cold when I went and they said I was wheezing. Apparently wheezing automatically means asthma because that is what I was told it was. They gave me one of the lung strength test, the one where you blow in a tube and make the ball float, and I was just bellow the healthy level. I believe because of my cold they said it was because of my asthma. So basically I was diagnosised because I went to the doctor with a cold right after going for bronchitis. Two respiratory related illnesses in a row apparently mean asthma. I have never used nor needed an inhaler, and other than the bronchitis I have never had a notible issue with breathing.