It could be allergies I too have a dry cough for many weeks, scratchy throat, sore itchy eyes.Fatigue, all tests are normal ..I think its environmental as I do know each day in CA they are aerial spraying , you can ask for a heavy metal test to see if it could be something like that ..good luck
Maxillary polyps can increase nasal congestion and contribute to post-nasal drip thus causing an issue with a persistent cough in the throat.
I would recommend consulting an ENT Specialist.
I tested AFB, Chest X-ray. All are normal but have bilateral maxillary polyp...Is there any relation with persistent cough in throat and polyp...
No physician's visit yet? This could be a number of things.