About 2 months ago i had what i can only assume was the worst case of the flu that i have ever had. After a few days i was up and around. About 2 weeks later i developed a clogged ear and vertigo but no pain. My doctor thought it was a sinus infection and gave me Levaquin and Zyrtec D. After a few days the symptoms disappeared. About a week later they came back. This time my doctor sent me to an ENT. The ENT diagnosed a severe sinus infection and prescribed Amox and oral steroids for inflammation. Immediately upon taking the steroids the symptoms disappeared and i finished my antibiotics. I went back in and he said i was clear. After another week, the same ear was clogged and the vertigo was back and this time i had a SEVERE pain in the back of my head just behind the ear that was clogged, which hurt severely when pressed in one specific spot where the head and neck meet. I went back to the ENT. He said there was no sign of infection but i had postnasal drip and congestion and to go back on another steroid pack. Immediately upon taking the steroid pack all the symptoms completely disappeared. However i developed severe nausea (unrelated??) which led to severe vomiting and severe diahrea. After 12 hours of continuously vomiting i suffered severe dehydration and was hospitalized and hooked up to an IV. All blood tests came back normal but showed a low level of Potassium which i was told was expected. As i could not take the steroids, the clogged ear came back, with the vertigo, and the horrible pain behind the clogged ear just above the neck. After returning from the hospital i went back on the steroid pack and immediately the symptoms disappeared completely (no nausea at all). Right before i take another dose the symptoms return and they are especially horrible in the morning, which i assume is the result of not taking the steroids in 8 hours. I have been to two internists, an ENT, and two hospital rooms and nobody seems to be able to diagnose this nor care to try other than to give me steroids which simply serves to mask a problem and doesn't fix it. Every time i have had these symptoms in the past, it has been the result of a sinus infection however the ENT said there was no sign of infection this time and i have already been on two different antibiotics in the last month. I should also say that i have pretty bad year long allergies but i have been taking Nasonex and receiving allergy shots for just over a year and this has almost completely eliminated allergy symptoms which i have suffered from for many years, so i don't think it's allergy related. The pain is unbearable and the clogged ear and vertigo a horrible nuissance. If anyone can help or lend a hand in figuring out what this is and how to fix it, i would greatly appreciate it.