Just found out my mum is going to die and I heartbroken

I have had the shock of my life just found out my mum has a form of kidney cancer , that has spreads to her lymph glands and she can't be saved, they are going to give her chemo to give us a bit more time, to get used to it, my mum has been my support my best friend for the last 38 years, even though I am happy married with 3 kids . She has been my support network though my problems we have been though so much together and I really can't deal with the fact of her not being here no more