Behavior like that occurs alot when a female wants to lay eggs. She becomes restless and is extremely active until laying the eggs. Has she had any contact with any males? Even if she has it is kind of late for her to be laying eggs. What is the temperature in the sunroom? I wouldn't worry to much, turtles can go a long time without eating. Also as for her not eating her biological clock could be telling her it is time to hibernate.