I Am A 75 Year Old Woman Who Has Suffered

I am a 75 year old woman who has suffered with a chronic cough for the past 30 years. originally I was told it was do to Reflux, however non of the medications I've taken seem to relieve the cough. I have been on steroid medications, inhalers, nasal sprays etc, to no avail. I presently take the following medications Citalopran, 40mg,Atorvastatin 20mg, Warfrin 5 mg, Sotolol 80mg, and Omeprosol, 20mg. I was hoping you might be able to help me