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Nuvaring should be re-inserted within 7 day break time (it should be left in place for 3 full weeks). If you have not inserted a new one within 7 days of removal of your last Nuvaring, you are recommended to use back-up protection if having intercourse (within first 7 days of use of next Nuvaring) for additional protection. Look out for development of any other new symptoms if pregnancy is suspected. If periods do not start within 10 days of expected period dates, or if you get abnormal periods, or if you suspect chances of pregnancy, consider visiting your doctor/gynecologist at the earliest for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Visit your doctor/gynecologist for further evaluation and clarification.
Take care.