Ok, if she's on the ground occasionally you may get lucky and have an easy to treat parasite that can be ID'd through a fecal test - still urgent and potentially life threatening but less difficult to test and treat. If you're unlucky you may have something that requires radiology and that's expensive.
Definitely bring a fresh fecal sample to the vet. Best way to do this is clean her cage 24 hours before the vet appt. and then you know any poops you find are fresh for the vet to run testing on. Put them in a small tupperware container to bring to the vet and they should be able to test it for a wide variety of parasites.