I'm 23 yrs old and I was diagnosed with asthma about 6 months ago. I had lots of problems with it at first due to having bronchitis for 2 months and then it took a while for my lungs to heal. The last 2 months it would not really bother me other then when it stormed outside. Now the weather is turning cold and I am noticing it more and more. I start to feel a slight tightness in my chest and a little out of breath and it usually last about 30 mins to about an hour a couple times a day. I try to hold off on using my inhaler...am I doing harm by not using it? I usually only use it if I start coughing uncontrolably.