You may have damaged the lining of your lungs instead of having asthma.
so you may have COPD caused by the damage.
There is lots of information on the Internet, as I find a person has to be their own Doctor.
I have been ill for 8 years and may have damaged my lung from aspirating my own stomach acids, which damaged the lung.
Do not give up, do your own research, be your own doctor
good luck
Sue
Are they sure you actually have asthma and not a different breathing disorder? What tests have you had done?