Interval 3 symptoms and conditions

Hello. My fiance was on nuvaring for nearly 2 years and gradually began experiencing many of the side effects listed here. The last 6 months were the worst in that the mood swings, anxiety and depression seemed to get out of control. She recently stopped using the ring about 6 weeks ago but it seems like the symptoms are still persistent. Does anyone have any experience with coming off of the ring and whether or not it could take longer than 2 months to get back to normal?