Advair Diskus and pulmicort

I am a 35 yo male who has had asthma since I was about six years old. I have always used Albuterol/Proventil to deal with any immediate concerns. Additionally, I have used the combination of Pulmicort/Serevent as a long term medication. I felt like the initial effects of that combo were spectacular. At some point, though, the doctor moved me off of that combo to Advair, explaining to me that the latter was just a combination of Pulmicort and Serevent. To this day I don't know the validity of that.

I have used Advair off and on for several years and I've never felt like I've gotten the same results as the previously mentioned combo. In the last two or three years I feel like it's done nothing. Additionally, in the last two to two and a half years, I've developed a low-level wheeze that is with me all the time 24/7. My albuterol does nothing for it. And -- it feels like I have a lump or something in the back of my throat. Some kind of constant obstruction.

The current theory of my ENT (my asthma doctor is worthless on this matter) is that I may have acid reflux. So now I am taking Prilosec OTC to see if, after a month or so, the low-level wheeze disappears.

Has anyone else with a history of asthma developed a constant, low-level wheeze that is unaffected by short term inhalers?