It is indeed a female, when it comes to feeding while I have very rarely observe issues with females it can still happen, I would not be worried at this size and if she persist you can always brumate her for the winter (she will be hungry when she emerge), or you can keep her as she is and wait but it could be a few wasted feeders in the meantime.
This is something I did a while ago to show the difference between males and females
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