Agree with Bogertophis, this is not normal. I've raised a lot of hatchlings and never run into this under good husbandry, it's always from newly acquired rescues or imported WC animals that have parasite infections or had a particularly rough trip here. A BEL is most certainly CBB, so parasites are less common in those than WC, but not impossible. Sometimes they can be pretty dormant and suddenly get more severe because an animal is stressed and their immunity drops. If it were me, it would certainly worth a vet trip to rule out parasites, and if the vet feels she is dehydrated badly, they can do IV fluids to keep her from getting any worse. Drinking, soaking, and humidity can only rehydrate an animal slowly, where an IV can do it very quickly.