Yes I had it and was diagnosed via an ENT surgeon about 3 years ago.
Basically the acid can cause a painful sore throat and the roof of your mouth can be sore.
Its not life threatening and I found if I took lansoprazole it kept it under control.
As well as not drinking, not smoking or being too stressed helped. Also staying away from spicy food.
If you can imagine the mucosal surface of the throat is usually very smooth.
When damaged by acid spraying upwards from your stomach, the cells can become sore and inflamed.
The symptoms I had were similar to a throat infection.
However only by examining my throat did they find it was acid reflux and damage.
It was explained to me that it the acid almost sprays like a fine mist up from your stomach. Imagine a deodorant spray - like that, but acid!
Lansoprazole is viewed a bit longer lasting(as in hours it works for) than omeprazole.
It is also wise to eat small meals on a regular basis.
Sometimes being upright in bed when sleeping can help avoid symptoms at night.
Acid and how we produce it, especially in times of over indulgence and stress is an individual thing. No 2 people are the same.
I had this diagnosed after stopping smoking 5 years ago and not drinking for about a year.
So all in all I was pretty 'healthy' when I was diagnosed with it.
Its probably nothing to worry about, however if the tablets you are taking are not giving you protection from the acid, then it is worth a trip to the doctors for further treatment.
I also found taking a magnesium type indigestion liquid - think you might call it Peptic AC where you are can help too.
Most of all though I can assure that the pain I had was significant. Some days it was severe. I never imagined acid could cause so many problems.