Oh Queen Mum, words cannot express how sorry I am for your loss. You have given her a great life and you gave her peace to her aging body, that is a loving goat momma!
It takes more courage, thought, and compassion to make the decision to bring any suffering to an end, but I have never regretted the action after the decision was made. It does hurt, but you allowed her to maintain her dignity to the end. I hope ya will let all the bad thoughts go, and cling to the Good ones....they will put a smile on your face....and yes, sometimes a tear in your eye.