Oh Sandy, I'm just now reading about your Mother. I'm so very sorry
The right words always seem to fly out the window in these situations but know that I care and you're in my thoughts and prayers. You're a good daughter and you did all that you knew to do for your parents. We're not God and we can't see the future on what will or won't work. You did your best and take comfort in that! Don't let anyone tell you or make you feel otherwise.