Suggest Treatment For Constant Headache & Dizziness

I have had this condition now for over 3 years and it doesnt seem to be getting better. The symptoms are constantly getting headaches, feeling dizzy, light headed and and being able to hear and feel my eyes move in my left eye its almost like there is liquid in my ear or built up pressure. I have been to my GP many times and have had an MRI scan and that came back clear. There are times when i feel like im going to fall over and collapse from feeling light headed. Before I had my MRI scan I went to see a ear,nose and throat consultant and had ear tests done and they were all fine. There is no pain with this and I can hear perfectly well but there is something there I can feel it in my head and its starting to drive me mad. Its getting me down and making me worry like its never going to get better. Is there any other things I can do? I hope someone can help or advise me on this Thankyou