Acid reflux help.

Evening all, I have suffered with on/off stomach and Reflux issues for years now, I am 37 and had an camera down my throat in 2010 and since have had 3 Barium Swallows, last being 2 years ago now, all normal. I take Omeprezole twice and a day and use Gaviscon when i need a boost. I very rarely get an acidic/sick taste in my mouth, at worst every 3 months and maybe have heartburn 1/2 a year.Very rarely cough and never have a hoarse voice or sore throat. However i very often get the following; • Forcing myself to burp to clear what feels like food in throat. Its almost like i can taste the odur from the food. • Watery substance that rises up when i force a burp that doesnt taste of acid. • Top of my mouth may feel a little sore or tingly in morning but throat doest at all. • Sometimes have that watery feel in throat i need to swallow. Keen to know any thoughts or any similar stories?! Surely the water feeling rising has to be acid after i force the burp, but it doesnt taste acidic or irritate my throat. could my throat be damaged that badly that i no longer get sore throats from it? I still get sore throats through illness etc. Another weird question, if when laying down flat on your back and you swallow your spit/saliva and seconds later you hear your stomach rumble from doing it, is that a sign that your pipe/throat are clear of any acid/food? Thanks Dave