I am currently nursing my partner of 20years, she has less then 2 weeks and like yourself can't see how I'm going to cope when she does. A good friend who's mother died suddenly last year gave me this phone number of people who helped her when she just couldn't find her way through the grief 

Cruse 08444779400 all the best and remember you are not alone it just feels that way. The strong ask for help when they need it

So sorry for your loss. I lost my mum a yr ago to cervical cancer. It broke my heart and I miss her so much. I'm happy she's no longer in pain because it was heart breaking seeing her suffer but I so wish she was still here. It does get easier with time people say but when I don't know. Just take it a day at a time. X

Oh bless you. You will feel robbed, and indignant. No matter what anyone may say. Cancer can be totally random and unfair.  My own darling mother died of stomach cancer even though she was a vegetarian and the healthiest and happiest person you could hope to meet. She too fought against it but 2 years was all she had. I still feel as though I let her down. I too am supposed go be the strong one but 6 years later I feel as bad as I did then and miss her every single day. The only comfort I can give you is from knowing that you had a wonderful mother and so many people will never know the joy we had. They will always live in our hearts and the things we  say and do will reflect the love and upbringing they gave us. Lots of love to you. I wish I could give you a hug.