I am 27 yrs old and have been using Novelon for birth control from the last 2 years (on and off). I stopped taking Novelon on 10th June. I haven't had a period since that time. Its going to be 2 months now and still no periods.i sometimes get backache and a feeling that my period is coming. However it does not come.We have always used precaution while intercourse . Pls advise.