I am so sorry to take so long to answer as your question was put in the wrong category.
Can you tell me what temps she was in and for how long?
Have you tried a warm soak?
I am in Fl. too, and understand what you are saying. When the temps drop to 50*'s, so do the Iguanas. I was almost hit by one that dropped out of my Pine tree. It is not uncommon for an IG to go into a deep sleep when the temps drop. I would definately keep her in. Continue with with trhe warming and you can also use some Plain Pedialyte in the warm bath. This will help because Reptiles absorb fluids throug.h the Vent area. She may start coming around with the warmth or she may stay under due to the abrupt dop in temps. This is called Brumation which is the Reptile version of hibernation. You will need to get a UVB light on the IG and bring the overhead temps into the 90* range. Do not try to give anything orally. Joan
They can saty under for a couple of months. Use 1/2 pedialyte in with the warm water as they do absorb fluids through the vent area.She needs the UVB to help the body metabolize calcium in the body. Basically it will be time that will tell. This is a picture of the one that almost hit me in the head.
Good luck with Lizzie! I have been on rescue patrol since the weather has dropped into the 60's and have been working overtime on Reptile Rescues with the cold snaps. Joan