Thank you for writing in HCM
I thing first you need to confirm the diagnosis of asthma by clinical symptoms.Supportive investigation like spirometry ; serum IgE may be done.Serious Cardiac problem like ischaemic heart disease
and heart failure
also to be rulled out if clinically suspected after cardiovascular examination.
If history and examination suggest asthma..then you have to start some reliever medicine like levosalbutamol
for transient symptomatic relief along with controller medicine like long acting bronchodilator
and steroid combination (metered dose inhaler with spacer).
Better to meet with local pulmonologist...for dose and demonstration of technique.