Ya know what? My friend had similar headaches like you are describing, and it turned out that she had some swelling of a nerve behind her neck, and it was giving her the weirdest symptoms. Physucal therapy really helped her out. My dizziness is allllll day. Not room spinning, but like a very lightheaded, pulsing feeling. It also seems like my eyes are controlling it. I never passed out though, have you? Tell me what tests you have had.