Sotto, I am very sorry to read that you had to put your beloved cat to sleep. She lived a long and happy life w/you and you gave her the best gift of all by not allowing her to suffer. I went through this last month w/my cat and I do understand how you feel. Take the time to remember all of the wonderful times you had w/her and know that she's still there in your heart.
Sotto, you made the right decision for your fur baby.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
