Scary indeed. We just have to put on our big boy breeches and deal with it - perhaps by starting with the acknowledgement that we all die some day in some way of some thing.
I am 81 years old with stage IV prostate cancer which has metastasized my bones and lymph nodes. I elected NOT to have chemotherapy because it made no sense to me to kill off everything and hope that the good came back faster than the bad.
I have literally been through everything the oncologists have to offer.
My last adventure was with a radiation infusion treatment which worked quite well for me. It is a targeted infusion which is given intravenously once every six weeks and is give six times. You might investigate that.
In the end though, the oncologists run out of FDA approved things they can do to try, and it comes down to every treatment is a delaying action, not a cure.
We do the best we can with the knowledge we have but at some point the fight is over for all of us We give the best we can to those we love and who have stood by us throughout these trials.
I can only hope to have the courage you display in your post when my time on this earth is done.
I am not big on prayer or religion so all I can offer you is my sincere wish that you are comfortable, pain free and in the company of those you love most…
Peace, brother.
Phil