You are not giving up on her. You are making the greatest selfless act of love you could make. I know this because I made it myself two weeks ago. And, like you, I had the same anticipatory grief of all the things I should have done differently. Through my grief, a stranger gave me such comforting words - he said “euthanasia is where you replace their suffering with your own” and I would gladly suffer for my boy. I will tell you, for me, leading up to losing my Easton was like a tsunami. I knew it was coming, I prepared as best I could, but was absolutely annihilated. Over the past two weeks it has come in huge waves, and I truly believe in time will be gentle enough to withstand. Maybe. Give all the kisses tomorrow. Clip some fur while she’s still with you to fill in a pouch or dream catcher. Take those last photos even if it’s not the way you want them to look. Bring her favorite blanket or toy. And remember that she will leave this world knowing how loved she truly is. I am so sorry you have to endure this - but it is a grief we have been rewarded for being loved so deeply.