I'm so sorry for your loss. I wish I could say that I can't relate, but having having had to make the decision to euthanize my Loca on June 1, 2009, I can. Loca was my second grey but she was my wild child and I miss her more than I can describe. Additionally, although I don't regret my decision, it's been a struggle coming to terms with it. I didn't have an autopsy completed because I guess I didn't want to know. I wouldn't have been able to deal with the possibility that the vets who diagnosed her could have been wrong.
I think the 2.5 weeks since losing Loca have been one of the most miserable, emotionally wrenching and isolating times I've ever experienced. I can't talk about it or to fully feel the loss, and it's hard to find people who are willing to provide the emotional support that I feel like I need.
I hope things get better for you and that you can find some peace knowing that, with Lisa's findings and prognosis, you definitely made the most humane decision. She will always be in your heart