Crimefighter ~
First, let me offer my congratulations on the news (via an MRI) that you don't have an acoustic neuroma.
I assume your ENT performed an auditory brainstem response (ABR) test. Your 'abnormal' results on that test as well as the symptoms you describe certainly suggest an acoustic neuroma. However, because the MRI scan - with contrast - seems to have ruled that out, you'll have to confer with your doctor to seek out the source of your symptoms. I'm not a doctor and any information I offer is strictly supposition, but you may be suffering with Meniere's disease or otosclerosis, - a hardening of the bone of the middle ear. At your age (39) that would be a long-shot.
These specific issues can be researched on the internet and, more significantly, with your doctor when you see him next week. I hope he can discover the source of your symptoms and that they can be successfully addressed, soon. Please let us know what happens. Thanks.
Jim