Hi, Lionnette.
I have experienced the exact same issue this week for a Pre-order album as well. I would recommend canceling the Pre-order and download it again as it most likely has not been charged. This article will walk you though the process.
iTunes Store: About Pre-orders
http://support.apple.com/kb/HT5714
Check your purchase history and you method of payment to make sure that the item has not been deducted prior to processing these steps.
iTunes Store & Mac App Store: Seeing your purchase history and order numbers
http://support.apple.com/kb/HT2727
If the album has been charged, follow the steps in this article to report a problem with this purchase.
How to report an issue with your iTunes Store, App Store, Mac App Store, or iBooks Store purchase
http://support.apple.com/kb/ht1933
Cheers,
Jason H.