How To Cure Recurring Viral Like Bumps On Uvula And Throat On The Side Where I Get Post Nasal Drip?

I have been to 3 different doctors when I get this viral like bumps on my uvula and throat on one side only . that is the side of my continuous post nasal drip. I sneeze, cough, throat clearing and I rinse with salt water and it will go away and then come back another time in a few months. I irrigate with NACL and busesonide to keep my sinuses clear. I have had surgery on my sinuses and my chronic sinusitis is under control but the post nasal drip is , I believe, causing this virus, if it is a virus. I have had throat swabs and am clear of strep so I assume it is viral. I have seen ENTs and dentist and family doctor, who gave me Flonase to use when my nose is stuffy, as needed. It works. I am very allergic to mold and I live in Florida and am going back to Massachusetts for two reasons, good doctors and to get away from humidity and mold. Thanks. Hope you can help me.