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Hi and thanks for the query.
You have signs and symptoms of infection in your genitourinary tract. As vaginal infections are common with nuvaring use and infection can spread to your urinary tract quickly it is most likely an infection. Your late period is probably associated with the use of nuvaring as it causes menstrual irregularities initially and pain and other symptoms are related to infection.I would suggest you must visit your gynecologist to get a thorough examination and swab test so that proper antibiotcs can be prescribed.Meanwhile you can take tylenol for pain relief. If you are sexually active you should get a urine pregnancy test as well to rule out pregnancy.