Hi There, I Have Had A Chronic Cough For Over

Hi there, I have had a chronic cough for over a year. I was taking ACE inhibitors before the cough started but getting off the medication did not help. My x-rays have been clear. A prescription of omeprazole for 30 days did not help my cough at all. My doctor also prescribed an inhaler and a steroid but that did not help either. What can I do? Am I a good candidate for a bronchoscopy?