Sorry for the so many post guys

I'm really confused and worried.
I'm on a F1 student visa here and my number is NOT current yet.
I was planning to travel to Arizona this month for 1 week.
Since I am applying for AOS, am I able to? (I read that I'll be out of status so they will not receive me back?)
However, I am staying in America for school, and Arizona is still in America, so is it allright?
Oh and, how do I know if I'm eligivle for AOS? They told me I was..over the phone. But that's no proof. Do I need a letter or anything?
Thanks all, and good luck to all!!