Burping/Gas Post Nissen Fundoplication

In my own case, I have a similar type of burp but it serves the purpose. I am one year post op and it is really more of a venting of air than a burp. It is a feeling similar to a reverse hiccup. I discovered that I could do it by accident. After I was back on solid food for awhile, we went to a pizza place one evening and I absent-mindedly ordered a soft drink as I usually did prior to surgery. I took several sips with food and then remembered that sodas were a no-no. A few minutes later I could feel pressure in my throat and I focused my mind on getting it out and was able to force it up into my upper throat and out. Since I found that I could get rid of the pressure, I have continued to drink sodas when I want one. It seems like when pressure builds up in my stomach some leaks into the esophagus and then I can force it out of my upper throat. Thank God it is only air/gas and not reflux that is leaking. I worry that it will eventually allow acid to leak but so far so good.