call the post office... give them the tracking number and ask them to help you out. when all i said and done explain u have a busy schedule and cant get the the p.o. to pick it up and to leave it on your doorstep.
if something is up you will know because they will want you to come sign for it. or they will shuffel you around on the phone....possibly to different people. all they need is a tracking number, and address, not ur name...
and yes i know all this because i had a priority mail with a grand cash in it for some of grandma's cookies, and it got fucked uptracking and delivery wise and i got real nervous, but the people at the post office dont know whut was in ur package so just act cool