Sick Bearded Dragon! Please Help!!!!?

I have an 8 year old female bearded dragon. She is normally very active and eats the second we put food in her cage. Lately she hasn't been eating and doesn't move much. We put carrots in her cage a week ago and she just ate them yesterday. She also has crickets in her cage that she lets just crawl on her. She will fall off of her log and not get up. She only gets up on her log when I put her up there. I tried giving her a warm bath but it didn't help. She has a sunlamp, for vitamins, a heating lamp, and a heating pad. The heating pad is on the bottom of her cage. There is a green mat on the bottom of her cage. I have no idea what is wrong with her and don't have the money to take her to a vet. Please Help!!!!!!!!!!!!!!!!