I'm so sorry to hear about your nana
I think animals can be a great comfort at times like these, dogs are very sensitive to emotions and she will be able to sense how you are feeling.
I know when my gran died I felt I needed to talk to someone, but didn't want to upset anyone. So I spoke to my dogs about her, they are great listeners.
Just hug Poppy and think about all of the happy times you had with your nana, she is in a better place now. xxx