Hi Dee,
This sounds similar to what I experienced all my life - and I'm now 68.
As a young boy my mum took me to the docs as I was a "mouth breather". Doc said it was juvenile catarrh which I'd grow out of.
My ears blocked up regulalry and I had them syringed weekly. The only lasting effect was scarring that can still be seen.
I was sent to ENT on inumerable occasions about my cough and throat issues but they only yested my hearing which was defective because of the scarring.
I had every known allergy test - negatively.
I had my sinuses flushed on a few occasions.
It was about 20 years ago when I told my GP my cough was worse when I had heartburn, he made the radical suggestion that what was coming up my oesophagus was then getting into my lungs - what is now accepted as extra-oesophageal reflux (also known as "LPR", "silent reflux" and "respiratory reflux"
.
If you visit the www DownWithAcid org uk site / book, you will find a chapter detailing the mechanisms of extra-oesophageal reflux and some of its many symptoms.
Unfortunately, although PPIs like omeprazole are great at reducing acid to make reflux less dangerous, they may not help with the reflux at all and no drugs effectively stop reflux (be it GORD or LPR). I was on omeprazole for 15 years, the last few of which at 80mg daily.
To prevent extra-oesophageal reflux, you need to reduce gastro-oesophageal reflux. You'll have seen all the lifestyle advice - which I followed carefully to no effect.
Eventually I was desperate enough to consider surgery. (I'd been offered it in 1994 but it would have been open surgery and sounded horrific.)
I had Laparoscopic Nissen Fundoplication in 2008 and it was the bestthing I had ever done. I was immediately off all medication and within a couple of weeks was rifding my bike daily, building to 30 miles a day before breakfast, whereas before the op, I was anaemic from induced hypochlorhydria (from too high a dose of PPI for too long), unable to walk 50 yards.