I'm sorry you guys are going through this stuff. I will also be praying for you both.
For the past few years, I have been suffering through vertigo, tinnitus, and extreme nausea.
My doctor explained to me that there was no clue as to what was causing these disorders, though she gave possibilities, and she believed it is/was Ménière's disease. She wasn't sure that the tinnitus and vertigo are actually part of the problem, although the nausea is absolutely related to the vertigo.
She did a thing where she put her hands on my face and suddenly twisted my head. This "procedure" fixed the vertigo but caused my nausea and vomiting to be critically worse for nearly 30 minutes.
She gives me Prednisone when I need it, which seems to take care of the vertigo.
She also gives me Zofran -- which I carry around with me in my purse because the nausea comes on with virtually no warning. -- for nausea.
I take nothing for the tinnitus and have sort of gotten used to the constant ringing in my ears.
They are still testing me -- particularly my hearing. Anyway, I still have all three conditions, but when I have had what seems like settling sometimes the testing sets it off again.