veiled chameleon in trouble... need help

[Sarahml]

My veiled chameleon is a female and she is 7 months old. She has a big black kind of scab on her side which has been there for about 1.5 months, and it now seems to be opening up. It is about one inch big. She is now refusing to eat, she won't touch her crickets, or her super worms, i went to the pet store today to get her wax worms to get her appetite going again, but they had none. I can not take her to the vet because no one here cares for chameleons, it is hard enough to get them to look at a rodent like a guinea pig. She has also been hanging out at the bottom of her cage quite a bit.... how can i tell if she is going to lay eggs. Any help would be greatly appreciated.