Hello, Welcome to HCM. I have read your query and understand the concern. This could be acute bronchitis with palpitations and tachycardia as you are having persistent dry cough without expectoration. The fainting spell could be because of low blood pressure or vasovagal which should be evaluated further by various tests. However,It can be diagnosed clinically but you must undergo routine blood investigation with EKG,chest x- ray to rule out any other pathology of lungs and to rule out any cardiac issue. You might require long course of antibiotics (amoxyllin with chavulanic acid or cephalosporins) with other supportive treatment like antihistamines (montelukast and levocetrizine) or nebulizers with steam inhalation frequently. Consult physician or pulmonologist immediately and take advise further. Regards,