Most beardies tend to dig in their hides. My male will do so, along with my adult female. Even when they weren't adults they would do this. I have yet to see my juvenile even go in a hide, shes pretty unsure about them.
Try adding fleece inside the hides or lots of paper towels all shredded up. My beardies seem to really like paper towels in their hides, though if I gave them fleece Im sure they'd love it even more as it is softer.
If you are worried that she has eggs you could take her to a vet and get an x-ray of sorts most likely to see if she has any. Though I doubt she does because of her age.
If she does then you'll want to get a decent sized tub, and get washed play sand. Moisten it so it holds burrows fairly well and she'll most likely dig in there when she needs to. Of course you'll have to put her in there as I doubt such a large tub would fit in her viv.
I'd also cut the top somewhat and put screen over it so you can put her heat lamp and
UVB bulb over it.
