New Scrub - Very Frightened / Nervous

[Bogertophis]

Dangled a ft small rat outside of the hide for a bit, she didn't come out, so I left it overnight, and when I woke up, it was still there.

Well you've only had her for what, a week+? And she's 2 years old, so I'd assume it's far more stressful on her that her entire world has just radically changed. She feels
very threatened, & with nervous re-homed snakes, it's often best not to even try to feed for 2+ weeks while they settle in, as they may regurgitate what they swallow just because they're still panicked. Note, I have no experience with these specifically, but just known many snakes of all kinds for many years...just be patient. Very patient.

These are not the calmest snakes to begin with, right? But in time your efforts should pay off, & she's very pretty btw. At first I thought you got a 2-headed snake, from the photo...