Just leave her to enjoy the holiday,another email or message might get her thinking you're a little needy.
I understand your concern,however I'm sure she is in contact with her family.
Really you only know her 12 weeks,not a lot of time to really 'know' someone and know their habits.
She's a big girl who can look after herself,she's not in a jungle.
Get busy with your own life and have lots of things to talk about when she gets home.
