One of my old boars pip passed away from 3 bladder stones that couldn't be operated on. I was syringe feeding him for a whole month because I couldn't manage to get a diagnosis from normal vets, then when I found our local Guinea pig specialist vet, he confirmed what was wrong and that it will get the better of him. I loved that boy so much, he got to 6 as well. He's the one who survived pneumonia, a few respiratory infections, and a really bad case of bloat where he had to stay at the vets for about 2 days. I came home to find him passed away after work one day. I always regret not getting him put to sleep.
. You did everything and more for her. She was certainly loved very much and was very lucky to have you as an owner. Be kind to yourself.