Unfortunately on an exotic Vet could tell you exactly what's going on with her. Do you have one you can take her to?
Is she dehydrated? Do the TENT test on her. Pinch the skin on the back of her neck together like you would your skin. If it goes back down slowly she needs hydrating. You can purchase some PLAIN pedialyte, NO FLAVORED and give that to her.
Is she eating since she's become sluggish? You can give her some ENSURE, PLAIN VANILLA, not alot. I use a small syringe and put some in there and mine will lick it out.
These are just some things to help UNTIL you can get her to a VET but she really needs to be seen by one as qucikly as possible. Gliders are very good at hiding their illnesses until it's to late. Don't hesitate. If you don't have a Vet, start calling around and see what Vets in your area know about gliders.
Also if you tell us where you live someone will help you try and find a Vet.