Hi All. I an new to this site but need someone to talk to/sound off and perhaps offer advice?

Mums been diagnosed with metastatic pancreatic cancer. There are no treatment options available for her. She is medically unfit for surgery and told chemotherapy will not help. She is for best supportive care only. She was given approx. 12 months in Sept 19. I feel totally helpless and don't know where to turn.  Macmillan nurses come round every so often and the GP the same but I feel as though we have been left to cope on our own. I don't feel they are offering any real value in terms what's going to happen and what to expect; they are quite vague; it's as if they don't want to commit to anything definite. I then go on Google which gives conflicting advice! I also find it difficult to talk to mum about the future as she does not want to talk about her diagnosis nor prognosis which is making it doubly difficult as well.. I feel guilty when in work as I am not with mum although I spend all time with Mum when not in work but then she doesn't want to do anything. I arrange outings to which she will cancel all the time; basically she doesn't want to leave the house. What am I doing wrong? 

Any advice greatly appreciated.