Job Interview

We have a job interview tomorrow!
It's only for part-time holiday work though.
Still, we're freaking out.
What if we say something stupid, or inappropriate.
What if we're too overqualified (trust us, you wouldn't think it, but we are overqualified for a lot of jobs in our field/range of "skills").
What if we wear something too dressy, and not casual enough for the region.
What if, what if, what if...

OMG, it's going to be mortifying.
*fingers crossed*