S*x while on period.

Ay, mommy, I feel your worry! Sa truth lang, the placebo week is when you're most likely to get your period, kaya relatively safe sya compared sa fertile window, pero hindi talaga 100% secure lalo na first month pa lang ng pills, kailangan consistent pa ang body mo mag-adjust. Best thing is to talk to your OB about it, they can give you peace of mind and maybe recommend backup protection pa lang para sa next time, especially habang nag-aaccustom pa ang system mo sa pills.