I had some experiences like this in the past, when i was mis/underdiagnosed.
I'd try to get some natural help, for example 5HTP and L-Tyrosin, maybe some Ashwagandha extract too (If you don't get a sore throat from the latter, like a few other people).
Even if it makes you feel only -5/10 it's worth it.
I was giving Rick a long-winded brain-dump approximating the physical sensations, and came up with the following paraphrase.
"It's like all my neurons and synapse pairs are playing a unique high-speed game of Tetris, with only 6 lines of movement room to work with. Every time I want to make a move, every synapse pair has to pause, write out to disk the entire state of the game, and load it back up to the next nearest synapse pair. Unpause the game, and repeat for the next move across every synapse pair in your stupid gray matter.
Also, I'm not sure how this sensation is even possible to contemplate, but my stomach seems to have found a way to turn itself inside out.
Oh, did I mention these axe-splitting headaches?
Furthermore, why is the ground underneath my feet so wobbly? WTF is going on, dude?"Bleh. It sucks, but I gotta get through this.
Self-improvement by removing an entire combo class of pharmaceuticals out of my system after a couple decades of directed use.
Time to get entirely clean for ranch life (again, and for the rest of our unnatural lives...)
Have been absolutely alcohol sober for quite some time now, and finding I'm really enjoying life a lot more.
FUCK
This is a magnitude higher than what i have undergone so far. Additionally, i always tried to take meds for the absolute minimal duration. Anxiety, depression, delusion and hallucinations were the worst i had to combat, aside from a couple of aftereffects from drugs, but for a few days only.
As for quitting pharmaceuticals, i was regretting my first take on a full stop, and there were a few more attempts, but if you don't want to stay on meds and you are a decisive person, you don't try to be on them, so as long as taking meds, there will be full stops along the timeline.
Can you try to combat the worst symptoms (painkillers?), at least?
"Couple decades" use is a fucking BIG issue, in terms of intensity. Your brain is currently lacking all the brainy things (neurotransmitters etc.) the meds were boosting/preserving. Everything regulated got unregulated.
This is a nasty way for sure, but if you know you want to do it, you simply got to do it to get through it.
If you fail, it won't break you, and you will try again to get out, but differently. So you will finally make it, and that's the most important.
And then you have a chance to live your real life.