I had such bad sinus problems that I had my tonsils, adenoids removed and my nose and sinuses fixed. Very painful. Long recovery and all for nothing. I was no better because the symptoms of the sinus drainage were all from reflux.
Not everyone is bad enough to have surgery to look for relief from GERD. I was qualified and had the surgery 5 days ago and the drainage has stopped completely.
I used tons of tissues, blew my nose constantly and swallowed the drainage till I was sick to my stomach much of the time.
Not everyone is as bad as I was but I finally got to the root of my problem.
Hang in there and ask questions. There are lots of people here with a great deal of experience in living with GERD, controlling it with medication and others like myself who have had to have surgery to correct it when it gets really bad.
Don't let the sound of your own wheels drive you crazy. - The Eagles