I had similar symptoms pain in the back of head, almost fainting, pressure in the ears and then I even got ringing ears and blurry vision. I had every inch of me imaged with CTs and MRIs and nothing came back. But, one doctor just put me on antibiotics because my ear looked infected. Cured everything within a few days. Then when I came off antibiotics 2 weeks later, everything came back. My doctors wouldn't believe it was an infection because everything tested normal. After two months off antibiotics I convinced them to put me back on and I stayed on for 6 months which made me feel amazingly better, but not completely healed. Don't know if this will help anyone else but it made a huge difference for me.