I am so so sorry to hear this. 
I do not mean to come across as morbid or negative in anyway so please forgive me. I lost my mum a few days ago. She was 53 and she also had stage 4 cancer. She battled for 2 years. I am numb, empty, lost, confused and don't believe it was real. 
my advice would be to not spend your time worrying. Believe me I know its hard, but what is going to happen, is going to happen and the very last thing you need is for when the inevitable does happen is to be filled with regret that all you did was waste the last few years worrying and being down. Enjoy every single second you have with your mum. Watch TV together, tell jokes together, bring up classic memories together, eat together and just love each other. Nothing else should matter! We all cope in different ways and have different situations. But when it comes down to it we all love our mums. I maybe wrong, but from my experience it still now doesnt seem real. Even after years of expecting. I have my doubts and regrets that I could have done more and I will live with that for the rest of my life. And that is far worse than the worry I had of when she is gone.. might just be me as I seen her nearly every night or certainly every other night. In regards to feeling scared for your mum just take her mind off it. Be with her, talk to her and support her and treat her how you always have done. I'm sure your mum loves you and the last thing mums want is their own children feeling scared or afraid. So don't feel scared or panic or anything like that. Live in the present! Not the future, and by doing this day by day and taking each step as it comes you can just simply enjoy the company of your mum. 
Forgive me if this hasn't helped or come across wrong. I have good intentions. I just don't want anyone to feel the numbness that I do and overthink your thoughts when the day comes. And who knows that may be a very long way off.  

Thank you for your words. I found out this afternoon my mums stomach lymphoma is now "fatal" as the dr put it. He wouldn't give a prognosis but chemo no longer an option and just steroids to help with any symptoms. I'm an only child and I feel my heart is breaking right now. I'm glad I found this thread. I just don't know what to do. X

Hi,

I'm very sorry for your mum. It sounds very similar to my experience. Although each experience is unique and individual. Unfortunately we have to accept what is going on. And again I aimed to be honest in this chat and sometimes the honest reality is not what we want to hear. But I am true to myself and share my honest true experience. I will not compare it to anyone else's as everyones relationship with their parents are different and the cancer etc is different. But nothing can prepare you for whats to come. My mum bless her fought for two years and I am proud of that. But even in those two years I could never have imagined the pain I am in. I also have a child on the way and would have been my mums first grand daughter and it kills me everyday knowing she will never meet my child. The pain and thought of having to go through a birthday without her or christmas or whatever it may be. It still doesnt feel real or right to organise my own mums funeral whilst trying to maintain a happy emotion and support for my pregnant partner.

Now again my advice would to just honest cherrish every single minute you can with your mum. Don't think each day like a clock just think what can we do today. What memory can I do today and just live each day the best you can. Then when the time comes I feel it will provide comfort knowing you did your best every single day. And trust me I know its a lot easier to sit here and say those words than actually doing it. I just try to give advice as some days as I was that upset or too down to even see my mum. I did most days but theres always that "what if" in my mind and regret.
 

If anyone needs to talk please do. Its horrible to bottle things up and cancer is a horrible horrible thing! Its *** :(

Hi,

I'm very sorry for your mum. It sounds very similar to my experience. Although each experience is unique and individual. Unfortunately we have to accept what is going on. And again I aimed to be honest in this chat and sometimes the honest reality is not what we want to hear. But I am true to myself and share my honest true experience. I will not compare it to anyone else's as everyones relationship with their parents are different and the cancer etc is different. But nothing can prepare you for whats to come. My mum bless her fought for two years and I am proud of that. But even in those two years I could never have imagined the pain I am in. I also have a child on the way and would have been my mums first grand daughter and it kills me everyday knowing she will never meet my child. The pain and thought of having to go through a birthday without her or christmas or whatever it may be. It still doesnt feel real or right to organise my own mums funeral whilst trying to maintain a happy emotion and support for my pregnant partner.

Now again my advice would to just honest cherrish every single minute you can with your mum. Don't think each day like a clock just think what can we do today. What memory can I do today and just live each day the best you can. Then when the time comes I feel it will provide comfort knowing you did your best every single day. And trust me I know its a lot easier to sit here and say those words than actually doing it. I just try to give advice as some days as I was that upset or too down to even see my mum. I did most days but theres always that "what if" in my mind and regret.
 

If anyone needs to talk please do. Its horrible to bottle things up and cancer is a horrible horrible thing! Its *** :(