A tracking number would be pretty useful. I had a trade with someone recently. The tracking said estimated delivery was July 1 but days after I still hadn't received it so I went into my post office with the tracking and they discovered that two numbers in the zipcode were switched and my package was on it's way to a PO in Washington so they called to have it routed back.
What's frustrating is the zipcode error was all the Post office's fault not the person mailing the package.
Did you not request tracking? Or did you just not get the number?