I am very sorry for your loss. I know how difficult it is to lose a member of your family. As Kismet said on your last entry, at least you can take comfort in knowing you did the right thing. Not allowing a beloved animal to suffer is far more loving and compassionate than the alternative. My thoughts are with you.
I'm so sorry for your loss. Putting down a pet is never an easy thing to do, we just put down our 16 year old dog a week and a half ago and it was the hardest death i've ever been through, I know how you feel. hang in there <3