Does she regularly eat mealworms? If so, she could be impacted (and please stop feeding them to her!). Normally with impaction they don't poop at all, but sometimes liquidy stool can get round the blockage. Or if she isn't used to eating fruit and you gave her a lot, it could be the apple. Or she could have parasites.
Can you give a rundown of her setup...lights, temps, type of UV, type of thermometer, substrate etc? Has she been getting calcium/vitamins? if so, how often?
Personally I'd give her a
bath and massage her belly from neck to vent and see if i could feel any lumps indicating impaction, and see if i could help get it to pass. I don't know much about the kibble and dried insects, but i can't imagine they'd be as good as real live food and veggies for a staple, so I'd probably see if she'd eat some proper food. If her appetite decreased and she wasn't pooping, I'd syringe feed her some baby food with a couple of drops of olive oil in to try and get her to pass the blockage, and if she hadn't within a couple of days (depending on her size/age) I'd take her to the vet. If her poops remained abnormal I'd also take her to the vet for a fecal.
If the two are in the same viv I'd separate them immediately, as if she has parasites I wouldn't want the other one to get them, or to make her feel stressed out when she is sick.
Is it just her beard that is black, or does she have stress marks on her belly too? If its the latter it's probably less of a concern as she is no doubt stressed by the move, but if it's just her beard, it probably indicates she is in pain, and if that was the case I'd consider a vet visit sooner rather than later.
Eyes half closed could be caused by her lighting, if you let us know what you have we can rule that out.