Also, how big is the tank, and what else do you have in there besides what provides light and heat as already mentioned? Since she's still little, there may be something in there that frightens her for some reason. Not that it will necessarily be easy to figure out what it is, but try to watch her behavior and see if her fear appears to be focused on anything in particular.
She may also just be having problems with being put back down in the tank, after getting comfortable snuggling up to a nice warm mammalian body. Our beardie used to do that when we tried to put him down, for a while after we first got him, especially if we were in an unfamiliar place. I think he also needed to learn that we would set him down gently and not drop him, and that it would be much easier if he didn't get too squirmy.
At least she seems to like cuddling with you.
And BTW, "stress lines" do not always indicate stress, but if you're also seeing a
black beard, that (along with the clinging and trying to hide) would mean that she's really upset.