I am with you my friend. I am petrified of the when question myself. Its not fear for me because I will be off in heaven, but I worry for my son. You should definitely put your affairs in order now to take the stress off your family after. My dad just passed and did none of that and it was a crapshoot. I would encourage you to pen letters for them to read when you are gone. I myself am on maintenance chemo til it no longer works. I have made it a year so far and am praying diligently for the opportunity to see my son graduate college and reach his dream. He is on the spectrum and I am his person…. It’s my biggest fear to leave him. The end I hear is not pretty regardless of being on or off it. I would give it some time and a good effort to ease your families mind. When your dr says its not working…. Then take that precious time with your family. A last vacation or memories. We don’t know our time. Only God does… so smile thru your pain and leave a legacy of love. You may have years or you may have months… you may be a miracle. This may not be the thing that takes you. I wish you love and grace and peace.