Hi Amy,
We had a similar diagnosis in our family and we were devastated when we heard the news, however some how she got another 5 years in her life before sadly passing earlier this year. But that was 5 years the doctors didn't give her. Then there was an instance of another family member who was given 6 months....and died in less than a few weeks. Either way...there is no way of knowing what is going to happen and you will need support, happy for you to chat, but just take each day at a time. The cancer council does offer people to speak to and counselling for family and friends of loved ones going through this.
Here if you need.
Maggie.