Sent it Priority with delivery confirmation,....
....That's one week for a supposedly 2 or 3 day delivery.
Priority Mail is very unpredictable, and more of a marketing gimmick than a true "service".
Pay extra with FedEx for overnight, and you get a guarantee, with tracking. Pay extra for Priority, and find out that all it really "is", is a 2 to 3 day "average", with no guarantee, and no way to follow it, unless you want to pay even more for some sort of tracking.