If she is young she may just be defensive. I have a gecko that as a young baby was very mean! She mellowed out as she grew up but she did give me a couple bites in the early days.
Do you mean mealworms? They aren't a great worm choice for geckos, since they don't have very much inside them. Small superworms are better for her, if you can get them. If she isn't eating much she may be bored of her food, so try different worms (superworms, butterworms <-- these are like crack for my geckos, phoenix worms, horn worms...)
Also she could be a little cold. What are her temperatures? She should have a hot spot with an under tank heat pad that's about 90* F. If she's cold she will not be able to digest her food, and will eat less.