I had a one off episode of quite acute dizziness at the end of 2015. It lasted half an hour and was very unnerving, but that was the end of it (or so I thought). I saw a GP at the time who vaguely mentioned things like labyrinthitis and BPPV, but as it seemed to be a one off it was left at that. However, at the end of March 2016, I had a few episodes of what at the time I'd have called 'lightheadedness' or dizziness, and within days I realised that I had a feeling of motion all the time, particularly when I closed my eyes.
There followed a lot of back and forth to GPs, no one really knowing what it was or what to do.As I think you said you did, I started my own research, as things were rapidly getting worse and I didn't feel I could go on without some answers. That was how I found Dr Surenthiran, asked my GP for an NHS referral, and was seen by him in July 2016 and diagnosed with MAV.
I assume my prior history of migraines played a part in my diagnosis, as did my symptoms which obviously he (unlike the GPs) must be used to hearing about. As has probably been your experience too, Dr S doesn't do any physical tests; he just diagnosed me from our consultation.
I have never seen an ENT specialist (that's where maybe I'd get the tests you mentioned?). One GP felt I should get an MRI just to be sure (as I was - and still pretty much am - getting daily headaches, though not migraines as such), and that was clear. She also spoke about it perhaps being useful for me to see someone at ENT, but when she read Dr S's letter she said we should maybe leave that for now so as not to confuse matters.
Could you tell me a bit about the tests you're talking about? Did you have them and feel they were of any use? It's really great to hear that you've progressed so far in being able to get back to work etc. I have probably delayed my own progress by resisting meds, but, as I said, there were a few reasons why I did that, although at this point those seem less important than just getting properly well again.