I have been on Cerelle (contraceptive) for nearly one year now and they stopped my periods after the first month or so. I'm also now in a happy relationship, my boyfriend and I have been dating for about 2 months now and we've been having unprotected sex since we trust each other and we're both clean.
Since I don't have periods but I know that the pill does not 100% prevent pregnancies, I want to occasionally check with a test but I read the instructions and they say to take it on the day your period is due or just prior. So I am unsure when to use mine since I no longer know when mine were due.