Thanks for your comment Sunny.
I have found that my asthma is triggered by environmental factors such as heavily perfumed persons, even floor wax. After aggressive therapy, I get better. I think that after time, you will too as long as you stay away from whatever is irritating your lungs. Constant re exposure will make things worse or continue like you are.
Steroids do wonders for asthmatics, I hate taking them but whenever I do, I feel so much better as far as bronchospasms go. Hopefully you will too.
IF things don't improve for you, then maybe you should see an allergist who would do formal testing on you to see exactly what is triggering your asthma.
Good luck and feel better,
Sunny