I don't know how much you know, and I don't want to talk down to you, but here goes:
Could she have laid eggs without you knowing it? Maybe she has reabsorbed some eggs or she ate them. It's a long-shot, I know. If she hasn't been recently gravid I'm assuming that the stress of her last move gave her low eating which never resolved. It leads to to dehydration, malnourishment, infections, and stubborn sheds. IMO she needs a vet to be re-hydrate her, and have a blood test to check her metabolism mostly for infections. She needs a fecal exam, too, and I would also want an X-ray.
She could have bad bacteria in her gut, making her feel sick, which needs to be cured. A fresh fecal sample is what you need the vet to kook at.
In my experience using a 3cc, for example, syringe to feed water a few times per day to an iguana that's in trouble is too little to fix an emaciated ig. IC, (intercoelmic(sp))fluids are given by the vet, and it goes into the space around her gut organs. 100 years ago some of us on this site were good at doing that at home.
Once she can eat well again, the water in her food will supply a large portion of her daily water. Hopefully she knows how to drink from standing water.
You can get probiotics balanced for birds for her from avian vet.
Look up the treat emaciated iguanas in this website:
Look for something called 'Emaciation Protocol'