CocoapuffPuff I had a similar incident, fortunately my mam recovered [temporarily, she was failing anyway] and what I have to say to you is YOU WERE THERE FOR YOUR MUM. YOU WERE THERE. Any comfort she had, you gave her. Hold onto that thought, you were there and you comforted her.
Sorry for the emotional derail, I was transported back to the incident with my mam, and that's how I dealt with how awful it was, that at least she was not alone, I was there. As you were, Cocoa