I have had a persistent, dry, non-productive cough for 4 months. I have tried allergy medicines (Zyrtec, Xyzal, Benadryl), and I have tried Prilosec in case it was acid-reflux related. But nothing has worked. Cough drops will stop the coughing for 30 -60 minutes, but then it comes back. My family doctor is stumped. Should i try to go to a pulmonologist? Thank you, Bob