So... 11 missed phone calls today... and not one message. Tomorrow give her a call to see if there is anything important she needs to discuss.
You can tell her you saw the missed calls and you left your phone at home. When you saw the phone it was too late to call back. Be polite like you're talking to a friend. If the conversation heads into R talk or her returning, politely inform her that you're busy and will call her back when you're free.
EDIT: Once again it is getting late again. I want to re-read the rest of your posts and provide feedback on those too. From what I've seen you're handling yourself well and have responded very well to her so far.