I'm currently taking the Rigevidon contraceptive pills (21 pills followed by a 7 day break).I intended to have my period this month, but I've accidentally taken 23 pills instead of the normal 21. Is it safe to take my placebo week now and wait for my period, or should I carry on with this new packet and have my period next month? What happens if I accidentally take 23 pills instead of 21 before my period?