I am very sorry for your loss. I've been there. Although I was appreciative of all the good words and condolences that friends, neighbors, and relatives gave me at the time, MY hurt was so deep that it just didn't seem to make a difference. Our pets give us unconditional love and we return that love by giving them the best care we can. You did your best...Your cat knew that..and you were there to comfort her and the memories you have of your times together will ease the pain. Again..so sorry for your loss..