@ossobuco,
I agree with ossobuco with reaching out to hospice. That was my initial thought when I read this. My dad had terminal cancer and they are excellent. They try for quality of life - including dying with dignity. They are able to administer drugs that other medical persons cannot - this help with pain, they are really strong and highly regulated medicines and only given to the dying.
In any case, they help with terminal patients to provide help all around - with the physical and the mental part of dealing with this tough sort of situation.
I was also thinking like ossobuco to reach to a hospital or facility that is most experienced with this syndrome - maybe you cannot go there for treatment, but I'd suggest reaching out to them as they could provide you even over the phone some guidance or maybe a better doctor that would be much more helpful for you.
Denying medical treatment is not killing yourself - my opinion why go through more pain and discomfort unless it will really help you.
And lastly - and certainly not least - I do wish you well; hope you can find some peace and rest, and some comfort.