--given the rather acute onset of your symptoms, if there may be some spinal problem at some level.

The problem is that symptoms from spinal/nerve root compromise and those from more peripheral neuropathy (from diabetes or other causes) can often be exactly the same, which is why the testing process can be a long process of elimination.

Would they at least be open to giving you a brain/cervical spine MRI, to rule out nerve condition or central nervous system demyelinating diseases?