Welcome to the forums! Thank you for taking this Dragon in, and they do worry us, trust me this won't be the last time something worries you, lol. They are like our little children, lol.
It's not unusual for Beardies, especially older adults, to go quite a while between bowel movements, I typically don't get at all excited until the 10 day mark, but even up to 14 days isn't necessarily a problem at all. However, it's possible that her diet may not be adequate for her, or that there is some other Husbandry issue going on that is causing her to be a little impacted. I know you're new to Dragons and you've only had her for a very short period of time, and you probably have the same lighting/thermometer/tank/etc. that the previous owner used, so it might be a good idea to post a photo of her and her entire enclosure and lights so we can catch any red-flags that may be potential problems, so feel free to do that, and then list what
UVB light she has, and what type of thermometer you are using to set up her temperature gradient.
Also, if there is any type of loose-substrate inside her tank/enclosure, such as any type of sand, crushed walnut shells, wood chips, bark, coco fiber, soil, seeds, bedding, etc. then that will certainly almost always cause impactions, as well as harbor and breed bacteria, fungi, parasites, etc. And since Dragons are prone to Upper Respiratory Infections, Skin/Scale Infections, Eye Infections, etc. and because they also lick EVERYTHING all the time, it's a good idea to dump out any loose substrates, completely disinfect the tank and all the decor/bowls inside it, and then just put down paper towels or newspaper as a temporary solid substrate, until you can choose a permanent solid substrate, such as textured, slate tile from Lowes (easy to spot-clean and keeps their toenails trim), Non-Adhesive Shelf Liner, Reptile Carpeting, etc.
