First time passport in the US embassy

[Proxyon]

I am about to become an US citizen soon. I have to leave the US the next day after my oath ceremony. Has someone applied for a passport in the US embassy in their native country ? If so, is it OK to apply for a first time ? I tried to contact the US embassy in my country, but got no answer.

[S_Owoh]

A USC is required to enter and leave the US with their US passport. If you want to travel you can request ( and pay extra for ) an expediated passport.