It's an adult that's what they do, she could go a year without food with no issue, changing prey it not something I recommend unless you are willing from now own to feed multiple each week (she might never switch back), a vet won't be of any help.
Here are you best options
Put her back in her old enclosure wait a week and offer food and see how it goes this will give you an indication on whether the change is responsible for the sudden feeding issue.
Double check everything, make sure that your temps are on spot and not to low or too high.
Keep handling to a minimum, maintenance only.
And most importantly be PATIENT BP are overfed in captivity anyway and 5 weeks for a 5 years old is nothing.
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