so my girlfriend took BC for about a year then stopped for a month and just Began back up again last Saturday and has been taking it every day since. Yesterday she said she got her period for the first time while on it but it was a "light" one and she stopped bleeding by today(a day later), while on the pill of course. So my question is since we had unprotected sex today how risky is it? I heard if you take it on your first period and the day after you're pretty much safe, but I'd like some input. Also she took todays pill before we had sex. Thanks