Had unprotected sex lasting few secs.had lighter thannormal period for 5 days a week later.was a puddle of blood not spot.implnt bleeding or light p?

Vaginal Bleeding: Implantation bleed occurs 6-12 days after conception, which is close to the time of your next menstrual cycle. Implantation bleed is usually darker in color than menstrual bleeding, lasting only a few hours, not days. Also look out for other signs and symptoms (nausea, breast tenderness, dizziness) if there is concern of pregnancy. If any concerns, take a pregnancy test.

Light Period: It is unlikely to be implant bleeding.More likely to be light period Implantation causes Light Cramps implantation spotting only a couple of drops of light or dark blood But if you are still concerned wait few days and do a pregnancy test or wait till next period if you miss it do a pregnancy test If you do not want to get pregnant use some form of Birth control or condom Have safe sex in future