this looks like mouth rot. the major swelling of the gums and the discoloration are signs of mouth rot. she need to get to a vet as soon as possible as she will need antibiotics to get rid of the infection and get better! the sooner you get the antibiotics the better off she will be, as it will just continue to progress without them.
this is a link to the Association of Reptilian and Amphibian Vets site. you will be able to find a reptile vet by state on this site! http://www.arav.org/find-a-vet/