It's shit, no doubt about it.
Did you try kratom? In the UK it seems it's illegal to buy or import it but if you find some at the back of the cupboard from before prohibition on the stuff began, then that's actually allowed. I've a lot of cupboards, lol. No way I'd still be sticking to the plan without it.
I feel for you about the jaw pain, I got arthritis in my jaw confirmed recently, after having TMJ problems for decades. That pain is no joke. Any pain in your head is so inescapable, I'd rather it in my arms or legs then I can feel a bit seperate from the pain if I try.
Gut pain, nausea, misery, general payback, that's the deal, not all these extra pains you never knew existed before.
If you can hang in there you can get off the merry-go-round. Just don't stand looking at the pretty lights after you get off it, turn your back, try to think of something else, do something else, I'm just saying shit I wish I could do btw. I'm reasonably clean (meaning compliant with doctors, not off opioids) but still completely obsessed.