Chronic pain sucks. I'm living with CML leukemia nd feel I'm on a banana peel half the time from fatigue and effects of the pill chemo I have to take twice a day forever. I'll send good vibes your way if it is OK with you. I have religious proscriptions against suicide, but am not yet in such dire straits, and certainly don't mind powerful analgesics, as I've had to be on them a few times in my life. The best primer on taking one's life is titled "Final Exit" by Derrick Humphries. I have a hunch that a good hospice program will be in my future. Death is part of living, and I'll just go on with the adventure. I hope your path goes well for you.
Regards, Bill Keith