I Have Dizziness And Ringing In My Left Ear That

I have dizziness and ringing in my left ear that developed after a sinus infection. I have seen 3 drs including an END for this. All they have done is look in ears and throat, the END told me I may have inflamed eustation tube and it will heal in time. This has been going on for 8 weeks now. How much longer should it take heal? the ringing and dizziness are troublesome.