I have just been diagnosed with asthma at age 70 after having trouble on and off throughout my life. I've always had a mucus problem. As I aged, I got bronchitis almost every year. I just had it for over a year and they finally decided to do a chest x-ray and a breathing test. The test was inconclusive and they said whatever I have is very mild. So they gave me an inhaler and that seems to help with the mucus. No one else I know with asthma has this problem. So have they misdiagnosed me? When I was sick for over a year, the doctor just said we all get these viruses and it will come back.