If your doctor says that at this point that you are no longer responding to conventional treatment, if I were you, I would look at alternative treatments that enhance the immune system, like better diet and herbs etc. (instead of doing nothing). In some rare cases, you hear of people healing themselves this way, like what was written on the Cancer section (about Cantron) in this healthboard. I don't want to give you any false hopes and sure some of this is not scientifically proven, but some people have claimed it has helped them.
I can't say that any of this could help you, but you could check it out. My heartfelt concern goes out to you and your family. I hope that you can get better.
I know of one other example of someone that I know that has stopped her cancer with herbs intermittently. She is quite elderly. She has been fighting this cancer for about 10 years or so (a remarkably long time). One time she said it was in her liver. She'll get it, then remove it with her herbal treatment. She has gone back and forth between chemotherapy and her herbs, as it goes into remission and then comes back. The last I knew (I asked about her a couple of days ago), is that the doctors talked her into taking chemotherapy again, and she developed a very bad reaction. Because of that bad reaction, I heard that she discontinued chemotherapy. So, as far as I can assume, she's back to taking her herbs. Her herbs have always helped her bounce back. I thought we would have lost her about a year ago, when I heard it spread throughout her inner organs, when she developed pneumonia in the hospital, and her immune system was compromised. But she's still here with us.
She sold herbs for a long time before she had to stop because of her illness. I met her at her herb shop years ago. She is in her mid-eighties. She's a remarkable person - she has a tenacious spirit. She and I would talk a long time how herbs have helped us. The only herb that she talked about taking for this cancer to me was Milk Thistle. I remember hearing that she was trying Yellow Dock too. There most likely were other herbs too, but I don't know what they are.
Herbal therapy is a science that is not very well understood in the United States, so it might be hard to find a health professional that could help you with this. This would take some research. With herbal treatment it's a must that a proper healthy diet be followed. You must do everything possible to try to stay healthy and build your immune system.
Try talking around and see if there are some holistic medical doctors that could give you some ideas. There's a lot out there, that I'm sure that I'm not even aware of. I'm always hearing of someone that claims to have beaten cancer with alternative medicine. There's also clinical trials of new promising treatments too.