Alright so me and my girl friend had sex a couple months ago and we were worried that she was gonna be pregnant, but she ended up having her period about a month ago. However, today she told me that she's late on her period and now i'm worried that she may have mistaken her period for implantation bleeding. She swears that it was her period and it did occur around the time that her periods usually come around, but I am still a bit worried. Any information would be welcome. Thank you