Renske--
My mother was diagnosed with metastatic breast cancer in a very advanced stage and she lived more than twice as long as the doctors told her she would. To my way of thinking, this was for two reasons. The first is obvious, American doctors will do anything to avoid a malpractice suit, including underestimate life expectancy. The second not so obvious -- she wasn't done yet and honestly believed she wouldn't die until she was good and ready.
Don't give up until you are ready. Period. Then, move on to the great mystery. Bright Blessings to you and my thoughts and support are with you, though we've never spoken.