Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
Your chronic cough
can be responsible for the ringing of ears. If the cough has stayed for this long it is possible that it could have been due to allergy
Have you tried suing steroids?
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.