I suffered with Vertigo for years and it is not a nice condition. It ranged from being affected for a couple of minutes up to 9 full days once. After years of treatment, scans, manoeuvres to move crystals etc etc I was referred to a hearing specialist mate of my GP who said after many tests I think it is a form of migraine. I want you try eradicating caffeine for a while. . I never really drank a lot of coffee but was amazed to find out there was tonnes of caffeine in the tea I drank (10+ Cups a day). So I switched to Yorkshire Decaf, that was nearly 4 years ago and I have never had an attack since. It may be coincidence? but try it!