Feeling Numb

Well I've not posted in a while but my beautiful mummy is so poorly.

She's been battling breast cancer then secondary breast cancer which had spread to her bones and lungs. She's been missing chemo sessions as she's been so poorly after having it so out of a possible 8 sessions shes had 3. She was due to have chemo last Thursday but when she went in an they did her obs her heart rate was 162 so they took her for an ECG and then they took her to A&E who then admitted her....She's been in hospital ever since. My cousin and Aunt went to see her yesterday and just happened to be there when the Dr came in to see mum who told her the antibiotics weren't working on the chest infection which they've now said is pneumonia and that they were putting a DNR in place as she was physically too weak to undergo being resuscitated and then asked if my cousin could bring me to the hospital tomorrow to have a chat with them - this obvz sent alarm bells off in my brain as that's not a good sign. So we went back today and the Dr took us into another room and said thay basically mum was really deteriorating and that she only had days left and that the next 24-48hrs were critical. We were hoping she'd be able to be transferred to a local hospice but the Dr said she's just too poorly to move. 

My cousin is going to spend all day with her tomorrow and I'll be there all weekend. Her breathing is horrendous, she's sleeping all the time and isn't eating. I know the end is coming and it's coming much sooner than we thought but I am terrified of losing her. 

What can I expect over the next few days...??