Thank You for giving Tilly a safe place to spend however much time she has left.
If you want to go over to the "In Memory Of..." page and look, there are several of us who've recently lost our little seniors. Mine was GiGi.
I didn't know how long I would have my little girl either so I just took one day at a time and enjoyed,spoiled and loved her.
Try not to dwell on the future and just enjoy each day that you have with Tilly, this could be the best time of her life thanks to you.