No Words

Now that I have committed to writing "Moments with Kara," I have lost the words. I am not sure what to say.
Is it because this is the most important story I have ever told or needed to tell?
Is it because it means so much?
Is it because it is a story people need to hear?
Is it because my husband and Kara's vet think I need to tell Kara's story?
Am I putting too much pressure on myself?
Is it because no one, other than my husband, has left footprints in my heart like she did? {And she was a cat.}
I have never suffered from writer's block like this and this is the time I really cannot afford to find it difficult to put words on the page.
{Lord, give me the words.}