I've been suffering from shortness of breath about the same time of the year every year for the last 8 years. I'm 46 now. They have done all kind of test on my lungs, thyroid and hart, including, stress tests, cat scans, etc. and everything is OK. I've been on Singular and Advair for allergies and asthma but still when I do some physical activities, I get short of breath really easily, even inside of my house with little chores.