Fighting two cancers for almost two years, I can certainly understand the frustration; I will be 83 this month and continue with Keytruda immunotherapy. As I have stated before, my philosophy is to just take one day at a time, some good days and some not so good. There is nothing I can do other than to enjoy each day I am able to do the daily things of life. Tomorrow will take care of itself. Keeping a positive attitude each day has helped me so far cope with some really bad days after tests and procedures. Stay positive and put the disease in the back of your mind is the only advice I can give.