You are understably upset with the diagnosis, but as you know it is difficult to be completely sure of the diagnosis of asthma
as children are unable to perform pulmonary function tests.
Therefore a trial of beta 2 agonists is given, something like Ventorlin and combined with oral montelukast
4mg. A natural solution is possible as he grows and may outgrow the asthma, but he definitely requires allergy
testing to find out what the allergies are.
At this age, it is common to have food allergies, that changes to pet dander or dust mite allergies as he grows older but it will at least tell you what to avoid and when to avoid.
Stopping and starting inhalers can be done only with salbutamol
but not with steroid
Hope that helps.