Young dumeril's tend to be shy and often require hides and/or burrowing opportunity to feel secure to eat, sort of similar to ball pythons.

What does your setup look like? I would provide a thick burrowing substrate, like either aspen or coco chips.

Also yes, like others have said, they are a cooler species and their hot side doesn't need to be that high. 85-87 max.

You don't need to take her to the vet unless you observed clear symptoms that she's sick. Vets can't do anything if there's nothing wrong.