Has anyone every gotten this message when they check the status?

We are still processing your application.

We may have either sent you a letter or attempted to contact you by phone. Please follow the written or verbal instruction provided to complete the processing of your application.

If you have not yet received our communication or you have any questions, please contact the National Passport Info Center with the above locator number.

I expedited my passport on Friday because it was taking too long through routine processing. I need it by June 3. They withdrew money from my account for the expedited fee today. When I went to go check the status, I received the above message. Called the National Passport Info Center....they don't know what the issue is. No calls from unknown caller on my phone today. If they sent a letter, I won't get it for another couple days. I am so incredibly nervous and worried about this status message. Any help would be greatly appreciated. Thank you.