Hi, welcome to the forum, your symptoms suggests involvement of sinuses, lungs or it can be due to
acid reflux. There may be underlying bronchial asthma or bronchitis. Bronchitis usually presents
with sputum (mucus), symptoms can be worsened by chest infections.
A test with bronchodilators for 2-3 weeks will be useful to relieve the symptoms.
Other possibilities are central airway obstruction, parenchymal pulmonary disease, gastro esophageal reflux etc.