Hi, so me and my gf had unprotected sex on the 04 September (9th day of her cycle, her cycle is usually 30+ days). I did pull out but she still took a plan B as a precaution 30-45 mintues later. Today is 5 days after she took the pill and she is having bleeding like it was her period (the blood was pretty much identical to period blood arcording to her).

So what are the chances that this is the new start of her period or just plan B side effects ? Or worse, implantation bleeding?

Thank you for listening.