Welcome Meemster! It is quite possibly to have GERD without burning, like many other health conditions, some individuals may exp various degrees. I've exp Reflux problems for approx 22 yrs, more obvious while carrying child 15 yrs ago, but didn't exp burning in throat for another 7-8yrs afterwards.
I exp burning in the throat quite infrequently, thank GOD, but the nausea, bloating, and flatulence is a different story. Oh, sometimes exp the chest and back discomfort too. It is in my opinion that the result of eating offending foods on one day could have lasting effects for several days or show up several days later, especially if you're exp a lot of flatulence.
I've come to realize if flatulence is overly offending, there's a chance that food have been fermenting in belly which is causing the problem.
Also, because this problem has lasted for a great length of time for you, I would ask doc about
an H-Pylori test, just to rule this out too. I think it's a good idea to eliminate diary products for awhile if possible. Maybe try Lactose free milk and Lactose free Ice-Cream, they both taste like the real thing to me. Hopefully, the Digestive enzymes will also help.