Sorry you're still struggling. I know six months seems like an eternity during the healing progress, you do not have complete healing yet. Everyone experiences certain universal recovery symptoms, but each person's body is unique, and their healing is unique as well. Some people heal more quickly than others, so try not to compare your progress with others. It can be frustrating. You are you, and your body will heal in its own sweet time.
I agree with Bill's suggestion that your problem is still related to the fact that your wrap is tight, and not letting all the food into the stomach immediately. The fact that you can't burp is evidence that your wrap is quite tight. This will resolve over time as swelling continues to decrease, and the wrap loosens up a bit.
In the meantime, be sure to take small bites, chew, chew, chew, and as Bill suggested, additional sips of liquid after swallowing. This helps the esophagus to push things through more completely.
When food/drink/medication remain at the base of the esophagus, waiting to enter the stomach, it can create irritation, which in turn can cause increased mucous/saliva, as the esophagus produces it to protect itself.
If you've had an endoscopy and your surgeon says that the wrap is intact, it's highly unlikely you're getting reflux from your stomach, but rather are having a reaction to the remnants of food/drink/medication at the wrap site, waiting to enter the stomach.
Hang in there. It takes lots of patience and trust and you work through recovery. People like us with LPR symptoms have sensitive upper GI tracts, and healing takes even longer. It's hard to trust that it will all work out with healing, but do your best. Stay away from foods that are irritating (spicy, acidic, alcohol, etc.), and try crushing your medication and taking it with a soft food, rather than taking tablets that are more difficult to get through the wrap. It WILL get better!
Nissen Fundoplication 2/09
"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.”