I had similar problems and went to an ENT. He claimed I had GERD. Said that GERD actually causes more of what looks like sinus issues than real issues. He did give me Prilosec and a Z-Pak since I figured I had an infection. I did get better still have some of the mucus but not as bad. I don't think I really had any GERD but for some of you others ..... oh I din't take more than a couple days of the Prilosec... too many drugs already, didn't need another. Best of luck.