Lost Iphone, offline in find my iphone

Hey everyone,

the name is Kat and this is my first time starting a disccusion by posting it up on Apple Support Communities>iphone>using iphone.

I just recently lost my iphone yesterday, November 13,2012 at 9:30AM in the women's bathroom in the third floor of building one at Skyline College. at 9:20AM, i went to the women's bathroom of the third floor in building one at my school in Skyline College just doing my thing while i was in the toliet seat. then at 9:25am, i was checking my mail on my iphone. at 9:30AM, i was washing my hands in the women's bathroom of third floor in building one at Skyline College. then at 9:35AM i was in my morning class in room 1-1306 waiting for my teacher to pass back our work assignment. so i didn't have my iphone between 9:30AM-9:35AM, so i couldn't find it anywhere. i told my best friend name Julianne Payumo but i call her as Julz. so i use her iphone to call my cellphone # about three-four times then I tried to use the Find My iphone application which i did both on my friend's cellphone and computer at the library and/or at my friend's house. i enter my icloud account on the find my iphone applications with my passwords, but when I try to locate my iphone it said my name on it like "Kat's iphone" and underneath it said its offline and i am pretty such i went to notifcation on the settings of my iphone and i let the notification of find my iphone application on but find my iphone application on icloud said i'm offline but iphone and the notification on the find my iphone application was on so why does it keep saying my iphone is offline but i put everyone online. what should i do?