My mum had 3 months from diagnosis. She really struggled at the end so when she passed away, me and my 2 sisters were relieved she was out of pain and discomfort. It has been nearly 2 years now. I still wake up and can't believe she's gone, but at the same time the ache in my stomach is subsiding. I try to remember the good times, the nutty sense of humour she has passed on to me!
With my experience it took about 6 months before the massive sense of loss started to calm a bit. Everyone is different, and we all cope differently. I had some bereavement counselling, which at first I didn't feel was helping but then realise the nightmares had stopped and I was starting to sleep better. So therefore the counselling must have helped. I do recommend this. Sometimes it's hard to speak to family about your inner thoughts, as they are also grieving. I find it hard to be open to close family, but yet again everyone is different.
I took up exercise which has helped my mind massively. It helped me cope with day to day situations better. I also started fundraising for Marie Curie. This gave me a focus, and an aim.
Wishing you the best in whatever you choose. Remember life does get better again, although we will always grieve for those gone, that grieving calms after a while. x