Thank you very much for the useful information.
Yes, this warrants a visit to a specialist not only for a comprehensive clinical examination but also for necessary investigations including;
Chest X-ray or other imaging studies of lungs like HRCT of lungs
Pulmonary function tests
Sputum examination (gram staining/zn staining and culture)
This is very unlikely to be from the air bag as inhalation of dusts like that require years (even decades) of exposure to the lungs to produce chronic lung problems such as DPLD (diffuse parenchymal lung disease) which can give you cough and shortness of breath.
This is most likely due to chronic allergies.
Or Asthma (mild form).
Or even COPD.
Only further investigations will unveil the underlying diagnosis which will direct further management plan so getting a consultation with a pulmonologist and discussing all the details i have mentioned to chalk out further management plan is the right plan and your best chance.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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But we can not rule out