I suffer from 3-4 ear infections per year. This last one came without warning. I was at the dentist getting a cavity filled, and they had me inclined with my head down toward the floor. I felt liquid in my ear shift. That was it. The next day, my ear starts hurting, and the whole way down my jaw line and into my throat. Only on my left side though. Any thoughts? Had tubes in my ears as a young child, I'm 33 now.