Hello, welcome to the forum and the wonderful world of snake keeping!!
The first thing I picked up on was that you're talking about upsizing prey, which is a good idea, but...
A) you don't want to jump too quickly, let her body acclimate to smalls a few times before jumping to mediums.
B) she's a pretty small female (based on her age, I'd be questioning if she is in fact a female) and even larger females never need bigger than a medium rat. So no need to upsize to larges, they'll be way too big for her. As for now, even two small rats is too much. It's a lot for her system to handle, especially considering her previous feeding schedule.
As for the handling, hold off until she's eating regularly. That means no handling until she has eaten 3 consecutive meals without refusal. That means if she refuses, the clock starts over.
She's stressed and you can't blame her. Be patient with her and give her time to acclimate.
Reply With Quote