One’s lungs can appear hyper-inflated on the basis of sub-optimally controlled asthma and, at age 26 with no history of cigarette smoking, that would be the most likely cause.
There are however other so-called obstructive airway diseases, for example bronchiolitis that can mimic asthma. Your first step should be confirmation of the diagnosis and the first test for that would be pulmonary function testing, before and after the administration of a bronchodialator. If you prove to have asthma the failure to experience relief of symptoms with an “asthma spray" could simply be a reflection of sub-optimum therapy.
As your symptoms are worsening, I suggest that you arrange for evaluation, either by your primary care physician or a lung specialist (pulmonologist) without delay.
Asthma is a very successfully treatable disease.
Good luck
you should see a pulmonologist and get a PFT test