Haven't received fingrprinting notice

[2muchwait]

Hi,
I applied at USCIS in Phoenix Arizona. Got my 797 a couple days ago.
Online status changed on August 23rd that they had mailed me the appintment notice for fingerprinting. Today is Aug 26th and I havent received any.
Should I worry? I am sure that I am going through all mails everyday and I didnt seen any such letter.
What worries me that I have received mails from other places that were stamped on Aug 24th.
Should I open an Infopass?

Thanks for any advice.

 

[sanjoseaug20]

You are in too much hurry. I would not worry for another week.