Thanks for the responses gents!

Yeah, I knew full well the entire time that I was likely freaking her out.
After all the hard work I've done this week to get her settled I felt really really bad about it, but I'm also concerned that she's gone so long without eating. 12 days is a while for a hatchling from what I understand (tomorrow is day 13).
My thought was "well, she's using a hide, I've got the temps and humidity near perfect, lets give it a shot".
I don't blame her at all for rejecting the food!

But anyway, 2 questions;

1) A lot of the literature I've read warns against feeding in the enclosure as (so it says) it will cause the snake to expect food when the tank is opened and therefore bite more frequently. Is this not true?
2) I'm definitely going to let her chill for a while before I try again. At least a few days. But I'm also worried about how long its been for her. Can she starve?

Thanks again!