Doubt it. Brain is extremely plastic. Most likely we are dealing with an unstable lesion of the ear eg a fistula. Migraines are thought be caused by sensory confusion. The brain is simply unable to compensate when the change is too great and doesn't correlate easily with corresponding senses, eg healthy ear, eyes etc.
Hopefully this lesion will heal/settle over time and at some point the brain is then able to compensate. Or the upset may take more time than usual to compensate for.
Maybe stress could do it, but the mechanism could be upset to balance of fluids in ear (hydrops) brought on by over production of stress hormone ADH which is known to affect inner ear fluid regulation.
My money is on some insult to inner ear window though causing a leak however short lived. Loss of perilymph fluid causes hydrops. The inner ear windows are some of the thinnest membranes in the body and one of them is tapped by the stapes footplate. If you had enough of a loud noise or pressure against the ear drum, you could find the footplate hitting the oval window hard enough to puncture it. Even a cotton bud could do it.
My 'MAV' came on 5 months (mostly asymptomatic) after pointing a shower into my ear. This proves to me 1. It can be caused by injury 2. There is often a delay from the time of the initial injury to when the 'MAV' monster arrives. So it must be hard for some people to realise what actually caused their MAV.
They have also found Hydrops on MRI in ears of patients diagnosed with MAV who have also had tinnitus.
If you have tinnitus and any kind of even mild hearing loss I think the problem organ is very obvious!
Over 80% of respondent to my poll say they have a problem with position in bed - that sounds like a nervous issue? Nope, that's got to be some kind of ear fluid problem all the way ...
Remember anxiety is involved with any vestibular issue at least to begin with until the patient acclimates to the new sensations.