yesyoudoknowme I'm so sorry your mum's last days were traumatic. It sounds as though we're in similar boats - my mum was in hospital for a couple of weeks and although through much persistence we did manage to get her home at the end, they told us she would die that day. In fact they half-expected her not to survive the ambulance journey back to the house, and I had to sign paperwork in advance about where her body would go if this happened.
But she had so longed to come home and once she was back she revived miraculously for a day. We hadn't been able to communicate with her much in hospital, or visit because of Covid, and to my horror she asked us what had happened to her - it turned out that she didn't understand why she was there and nobody had explained (she had collapsed and been rushed in by ambulance). I feel this will haunt me forever, that on the few occasions I did manage to speak to her on the phone while she was there, I didn't realise that she was bewildered and probably scared.
I tried to reassure her, that we loved her, and she knew she was back home and wasn't going anywhere else, but she died two days later. I think she made one last massive effort to rally round because she was so glad to be home, but it was too late by then. I honestly think that if she'd been discharged from hospital a few days earlier she might still be alive. I think she'd just given up, really, and thought we'd abandoned her there.
Sorry. I spent days and weeks tearing myself apart over this and while I've largely stopped doing it consciously, the thoughts and guilt are still there just under the surface.