At first I couldn't figure it out....
Then it hit me...she is a daddies girl. She wanted to go home. Even though I was planning on staying till Monday I ended up cutting the visit down and leaving on Saturday night. Thank God I did because now that I am home I KNOW for sure that is what it was. No more crying.
She is actually cuddled up with daddy right now sleeping like a baby and it is so nice to be able to use both hands freely without her screaming in my ears.