Breathe in, breathe out. Good.
I'm sure it got there just fine, and if they were expecting it they would have let you know if it hadn't arrived.
You might send an email to your contact, or give them a call, if you're really worried about it.
I saw someone wearing a shirt that said Little Women on the front today. I looked on the back to see if there were Greek letters on the back, but no luck! Oh, well. . .