What about Mary?

The Sunday school lesson this morning that we taught was about Mary. I am left with several questions about her:

• Did God only ask Mary to accept this role? Is it possible that someone could say "no" to God in such a situation?
• How did she feel during the pregnancy? Did she worry?
• Was it a comfort for her when Elizabeth's baby lept? Did the confirmation help Mary to believe?
• Was it comforting to her when Joseph believed in what she had told her family?
• What about in Bethlehem? What about when "there was no room for them in the inn?" Did she doubt that the situation in which she found herself was of God when it didn't go exactly smoothly?
• When did she come to understand who Jesus was, and what that meant?

Note: edited for spelling and content the next day. Hint - if you read something I write, and you wonder about my grammar and spelling abilities, it was probably written late at night. Did I not even spell-check the thing before I posted it? Good grief.