I have had the same FedEx/UPS problem happen to me.
UPS delivered a purchase to me 10 days late.
Don't worry. You will get it.
By the way, I sent by US Certified Mail a tax return to the IRS, with a Return Receipt Card requested. It was delivered on August 12th. I just got the Return Receipt Card back yesterday, more than 2 months after the delivery. I had to call the US Postmaster in Utah, where the IRS Center is located, to get the card. It had wheel marks all over it.
Mannyrock