I see. Well its a very tricky thing to diagnose, but with your history its a strong possibility. Fistula’s aren’t always very violent in presentation … I had severe vertigo for 5 weeks after my trauma but then became symptomless for 5 months, but the fistula had not healed - in my case it was obviously leaking fluid every night and I had a sensation of fluid clearing in my ear every morning (no fluid actually leaks out of your ear canal - this is all internal between the inner and middle ear and behind the ear drum). Had I known how serious this was I might have taken action but quite frankly most doctors are totally ignorant about this condition and its complexities.
The tricky part comes once it starts to heal - the pressure builds up in the ear and it seems it can cause explosive force on the wound which blocks it from fully healing.
This condition is called secondary hydrops and can take a long time to resolve. I’ve heard of some people being ‘cured’ by PLF repair but there is so little controlled evidence of the natural history of this condition that its hard to know if you should have surgery or not (which of course runs the risk of exacerbation)
Vestibular migraine is a reasonable classification but the root cause is not understood. Some doctors and neurologists believe its caused by migraine, others believe this is wrong. The split is political. Its a ridiculous state of affairs. Some doctors don’t even believe perilymph fistula exist - this is really dumb as they are the perfect explanation for the onset and progression of hydrops. Its also obviously the weakest point of the inner ear and the one most exposed to the outside world and most at risk from injury. Good luck explaining the spontaneous onset of these symptoms any other way without resorting to nebulous concepts,hand waving and pseudoscience. I guess there is a possibility that something else in diving causes the perilymph region of the inner ear to shrink, and the endolymph to grow but surely a fistula is a better explanation?
I recently posted a paper which has now found MRI proof of hydrops in subjects diagnosed with vestibular migraine. We need more of this evidence to stop doctors talking rubbish about this condition.
Good luck at the doctors!