BT,
Mine seem to be migraine related. Do you suffer migraines?
They are not always your typical pounding headache...in fact, my headaches are moderate, but I have other issues along with the vertigo.
I have trouble finding the right words, and really have to concentrate on my speech.
I also get confusion/brain fog, fatigue and sensitivity to noise.
Here is an article to check out. Vestibular migraines often present with vertigo.
(anxiety is also associated with several inner ear issues...so that is another consideration.)
Sorry...posting from my phone so I can't make this an active link...just copy and paste for now....or I will fix it later when on my PC.:)
http://m.hopkinsmedicine.org/neurology_neurosurgery/centers_
clinics/vestibular/conditions/vestibular_migraine.html
S.C.