Driven,
Apologies for the delayed input, but from my perspective, I stopped Cymbalta in November 2018 and I started feeling myself again by around the same time last year. I went back on Celexa as my system was used to that, but everything that was keeping me in this state was STRESS. It has been a combination of making the right choices, making the right plans and seeking all the help I possibly can.
I sure don't have the same symptoms as you, but today I have had a really spinny head - I don't know why. I went out for an hour and felt I needed a rest. Still not normal, but this is one day. I have to accept that these will still happen. Weekends are generally when my body cries out for relief...
You really have my sympathy, but all brains are capable of change, and it changes according to our environment. That environment might take a while to get right. What with my wife, mine is still far from ideal, which is probably why I still get spinning heads and so forth.
If you haven't done so already, I think you need to get uber organised and start documenting all these symtoms, day to day and hour to hour, and then present these and don't take no for an answer. And these answers ARE out there. This is what I did. My answer was where I least expected to find it and that was sacking the p-doc, walking away from the NHS, seeing a homeopath and drinking various tinctures and herbs.
It won't last forever... I promise you my friend.