I agree with most of the above posts, with the exceptions of the mealworms. Mealies should probably be given to your beardie only after you have him pooping regularly. Try small crickets, silkworms, butter worms, or waxworms to intice her appetite. (although wax worms are very fattening, so after you get her eating i would only use them as an occasional treat)
I also disagree that you should hold her as much as possible. If she is new to you she is stressed, and if she isn;t eating then that proves she is maybe more stressed than usual, holding her a lot will only stress her more. Leave her alone for a few days until she starts eating and pooping regularly.
It is also normal for reptiles to go off food during times of stress and its very likely she will start eating on her own soon. Keep offering her food, at this age she should be eating mostly bugs (dusted with calcium/vitimin powder. Make sure that the calcium powder you are giving her is made of mostly calcium carbonate, and also contains D3) as she gets older her diet will rotate, and as an adult she will eat mostly veggies and a few bugs. My adult female gets salads every day, and bugs once every week or two, with a day of no food here and there so she can digest and flush her system.
Soaking beardies is a good way to make them poop, as stated above, and also a good way to keep them hydrated. Beardies come from the deserts and get most of their needed water from their veggies and crix, but studies have shown that kidney failure due to not enough water in their system is more common than was thought before. Because of this i like to mist my beardies that wont drink from a water dish. Not often, maybe once or twice a week lightly, they usually open their mouths and gulp down the water.
Do lots of research, and DO NOT depend on people at pet stores to give you good advice. There are lots of credible websites online, many of them are linked to on this website, and there are many good books available as well.

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