'well' to dying , over night...

Sorry for the drastic title,I haven't reached out for help or support while caring for my mum the last 12 months. The heading is what it says, she was 'well' on the outside one day , then I took he for a blood test , even pushed for it and it was a test for something unrelated. Then doc said ' lets feel your tummy as matter of routine' the rest is as it says above. Long story short my dear mum ( who is my best friend, my world ' ) found out she had terminal cancer- shock was an understatement. I know so many people have received this news too  but I'm really struggling as I have become her everything , she shut everyone medical out as she so scared. Is a lot of pressure and Im finding it hard. I and not complaining and would never in a million years say anything as I know how precious time is. I guess what Im saying is I need support and find it so hard. good luck on this awful journey none of us choose x