I sympathise with you.
In summary - Probably 15/18 years ago I started to suffer with reflux, due to a hiatus hernia, after 10 years or so on medication, I noticed a lump sensation in my throat and about the same time started coughing when talking.
Being on the phone a lot at work, it was a big problem.
So I had a Nissen fundoplication (a partial one) which went great, I had the usual problems, of eating a bit to quick or not chewing enough (when I was back on solids) after the op which lead to terrible pain as the food was stuck. But that soon made me eat smaller mouthfuls and chew more.
For 3 years I was ok and was so pleased with the results, although the lump sensation in my throat never went away.
Then in October last year the cough returned with a vengeance, after feeling symptoms of heart burn again, infact I could lie in bed and actually feel the burn sensation moving up my esophagus.
I have had an endoscopy since to check the Nissen is still in place, which apparently it is, which is odd, as I know I am getting some mild reflux.
Now prior to referring to ENT my GP has but me on Lamprazamole and Rantinadine, which has made some difference - the burn has gone, and I can sleep flat.
Unfortunately it has made no difference to my persistent cough. (my throat is not sore though)
The only thing that does is an over the counter antiseptic throat spray that I now use if I cough or get the asthma sensation. I also avoid chocolate and coffee which irritate it immediately.
I found this forum in search of others with the same cough issue, although I am just about resigned to the thought that my larynx is permanently damaged due to years of acid reflux.
Keep us posted about what ENT say. Goodluck.
(For those considering a partial nissen fundoplication - it is still the best decision I made )