Hi. Me and my girlfriend had unprotected sex in 4 September, which is her 9th day, her cycle is usually more than 30 days. I ejaculated outside 100% but we still took a Postinor-1 within 1 hour later in fear of precm. 5 days later she had a period-like bleeding that lasted for about 3 to 4 days. The bleeding was heavy enough just like her period according to her. 18 September she took a pregnancy test and it showed negative. So are we safe from pregnancy and the pill worked ?