I am so sorry to here its been going on sooooo long and still no definate answer for you.
I have made good progress and am back to work full time just this week.
I have been on some meds called Betahistine and it does make a small difference which is better than nothing and I am able to do far more.
I am going to see a physiotherapist this week to see what action to proceed with as had the initial 2 weeks ago and she needed to go away and research and discuss with her colleagues before starting any treatment.
I do hope your all on the way to recovery as I am
, slowly slowly.