Yes, nerve damage to your ear may help in getting a dx. They can test this with an auditory evoked potential test. Painless, like a visual E P test, only you have ear phones on and can close your eyes.
I sure hope you can qualify for STD! Nobody needs money problems on top of everything else you're going through. I've been on Ltd for almost a year, and it's hard making ends meet with 70% income, let alone no income.
I wish you the best in your quest for a dx.
Mike (dx - demyilinating disease, possibly MS)