FedEx Tracking isn't always updated like it should and sometimes packages don't get scanned at every destination like it should either.
Sometimes you may also have to contact the FedEx customer service and be prepared to give them the tracking number and they sometimes can look deeper to find out where your package may be.
Sometimes I've had packages sent through FedEx and the package tracking info only updated when it departed and then only updated tracking information when it reached my house.