How Concerned Should I Be

<p>I sent my app 10/15 via mail so Penn should have received it at the latest 10/20ish and I still havent received a penn portal (which is to be sent out 10-14 days after they receive your app). I am calling tomorrow to check the status of my app but Im not sure what to say if they say they never got my app. Should I really be worried and if, for some reason it got lost in the mail, how should I react if they say they have never received my app.</p>