Hi. Cough can be because of an irritation in throat (infection or gerd ), trachea and lungs (asthma, infection etc).
Next Steps
consult an ent surgeon for symptoms of COVID 19 , get a COVID 19 RT PCR test done, chest x ray, sputum test for culture/sensitivity, CBP for eosinophilia.
Health Tips
drink warm water and avoid chilled items and avoid spicy/masala/chilli foods.