I agree with the above posts but just a few added thoughts:
She lived in one place (w/ the breeder) for about 2.5 years. She probably wasn't handled a whole lot. So between those 2 things, coming home with you to a
whole different "world" is very unsettling...yes, she is trying to find her way home, to familiar territory.
Since her "world" is vastly different now, you want to make as few other changes as possible to help her settle in: always best to feed exactly as she had before.
Since she was eating weekly, I would NOT have sized up...at least not for quite a while, well AFTER she had settled it & probably also by feeding every other week.
Stop "rocking the boat".
So yes, handling can & must wait until she is settled in (ie. eating regularly for you)...sadly, her escape was also a set back. She is frightened & stressed.
Do NOT "take her into the shop to see if she eats for them"...not unless you plan to leave her there...it's just more confusion & stress.
Some snakes may always be more skittish than others...isn't that true of everything? Every snake has it's own mind & personality...do your best to understand &
help yours.
When you get a new snake & for BEST results, always initially house & feed them as close to what they had before while they settle in...it makes it faster. Obviously
this doesn't apply if the snake is a rescue from a bad scene...but otherwise, avoid changes. Use the same substrate if you can too...whatever worked before.