Sorry it's hit you so hard!
How long did you take to tail off the dose? With one antidepressant (Amotryptilinee) it took months for me to ease off it. I had to reduce the dose by 25mg one day in 4, wait a week and then reduce on another day and so on. Any faster and I got flu like symptoms and pain among other things, but at that pace i had few ill effects and came off successfully.
I think some doctors don't realise how long it can take.

I can see going back on a tiny dose and weaning off that may be a retrograde step.
My guess is if you lasted 13 days, the withdrawal symptoms should wear off in the next couple of weeks (though I don't know really) and then you will have to work out what is the illness rather than side effects.

Sorry if this is discouraging, it's just thoughts, not advice. You probably know more than I do anyway. I think you have lasted so well, you will make it through.

I really feel for you.

Good luck!