I expect you have been told about the fact that you can have reflux without knowing it. Silent reflux is very common, and can do a lot of damage without someone knowing it. Here's a link with some information about it:
Glad to hear you've sought medical advice for this, as it's not good to ignore a problem like the one you're experiencing. Good luck with your search for answers!
Nissen Fundoplication 2/09
Allergy/Asthma"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”