i was having sex with the guy i'm seeing a few days ago, and my period wasn't due for another 3 days. however, when we woke up the morning after, everything was covered in blood. i wore a pad for the next few days and nothing else came of it, and now my period is 3 days late, which is weird as i'm very regular. now i don't know if that was my period or if i'm genuinely late? just wondering if anyone has any input or insight perhaps?