I see, I was wondering if the temperature would be too low for her. What would you suggest that I do for her in order to create this heated shelter? Sorry for the many questions, I am pretty concerned right now and I am new to this whole thing.
Also, do you really believe that her making sounds at night is really the start of an RI? I will try to get her to a vet ASAP, but I am not sure when I can just yet.
The sounds might be the start of a RI. Maybe not too.
If it is the early start of a RI then warming up the tortoise will usually stop and reverse it.
Read through these for some examples on what to do, and then come back with any and all questions:
http://www.tortoiseforum.org/threads/beginner-mistakes.45180/
http://www.tortoiseforum.org/threads/how-to-raise-a-healthy-sulcata-or-leopard-version-2-0.79895/
http://www.tortoiseforum.org/threads/another-night-box-thread.88966/