have you tried Elderberry? And Zinc? Both are great for sinus/ear problems as they promote healing and the Elderberry clears the nose, throat and lungs.
Hope this helps - best wishes
Oregano oil isn't best taken under the tongue -- it needs to be digested, so it's best taken with water as with any tincture. But it isn't the strongest antibiotic -- it's more of an anti-fungal. Garlic and goldenseal, to name two, are better antibiotics, and the strongest but one you have to careful of is colloidal silver. That being said, were you on antibiotics several times for this? Because if you were, that could be your problem. Overuse of antibiotics causes a chronic die off of the beneficial organisms that protect us from infections. Generally, sinus infections go away by themselves, but they can become chronic. Have you tried homeopathy? And as for Mineire's ear, there's no reason to fear deafness from it. Dizziness, but not deafness. You may have other issues, but you're putting too much emphasis on that one. As for clearing, there are many teas and herbs that help with clearing mucous. Perhaps it's time to do some research so you get the right remedies for the problems you have, and since this is recurring that probably would entail seeing a naturopath or other natural physician. Good luck.
http://articles.mercola.com/sites/articles/archive/2012/03/12/cool-and-less-humid-air-decrease-nasal-congestion.aspx?e_cid=20120312_DNL_art_1
http://www.youtube.com/watch?v=v7QvfXp0Mzg
http://www.youtube.com/watch?v=jhkqFGxJthc