The deal thread says the 15th and today is only 11 days so it's not even 2 weeks yet. Was payment received on the 15th?
If you are negotiating via PM for a period of time or mention in the deal thread that payment will be received in 2 weeks then it is different. It's clearer when it was agreed upon to get the $$. If you both agreed to the thread on the 15th and payment was not received for 2 weeks and no contact via PM and you didn't get the $$ then I would leave negative feedback.
Try to sort it out via PM the card will probably arrive in a couple of days. Otherwise refund the $$. And if she receives the card she can just pay you again.