I haven't a clue what to do or say - I just found out I have stage 4 cancer

Hi there, my name is Paul, I'm 62 and live in Mid Wales. I have literally been diagnosed with Stage 4 cancer. I saw my Oncologist last week and he showed me the results of the pet scan. There is radio therapy being organised for my shoulder but I also have cancer in my lungs and in the kidney bed where they removed my kidney jn June 23.  I have been given information on 3 different types of treatment, but I'm at a loss as to which one to use.