Fighter, I have noticed the exact same thing the past 3-4 months, I have also been wondering if it's my ears. Have you noticed either of these things:
1) It's worst when I first wake up, especially if I get up in the middle of the night, I can't focus on anything. This is new so I think it must be related to my ears.
2) Have you been to a library lately? I was, and within 5 minutes of looking up and down and the books, head slightly tilted, I was so dizzy I could hardly walk. Otherwise my primary symptom is slight nausea.