Saw a higher-level specialist last week who assured me 'everything will come good' after another night of ringing in the ears, the right side of head feeling stuffed with cotton wool, and the room swinging around me like one of those pirate ship rides bringing nausea. Apparently my hearing is OK, and he doesn't see anything, so I'm back on medication 'for the dizziness', one of which is a gingko bilboa extract.
After a few days the wild dizziness was reduced to my now-normal-for-2-months totteriness, the other symptoms stayed (as they have for 2 months of being treated by 2 GPs and now 2 local specialists), and we went overseas for an email consultation.
Many emails and involving people later we are ready to talk to the medical insurance people because the advice is to have an immediate MRI, which isn't available in Burkina. When we get their response I'll get back to you.