Nancy said it right, Her cage has to be a consistent warm temp. The room can't be her heat even though it is at least 72, they can still get cold. Yes, do NOT stick her in water just yet, you MUST use your body heat for this one.
Make sure her cage is always a warm temp. If you have a fan in there, I wouldn't recommend it pointing at her, just a tip.
Hope all goes well with your little girl. Remember, I am no Administrator, just an owner with my hedgie opinions.