hi there,
I'm on the contraceptive pill but wondering if what I experienced last was my period or implantation bleeding, it happened around the time my withdrawal bleeding time supposed to happen but am confused if its withdrawal bleeding or implantation bleeding, to be honest I had intercourse 6 days before and took the pill the right time to that day... but I saw a lighter period than usual that lasted around 3 days, what do you people think it is? thanks..

There is no way for us to tell. ANY time there is penile insertion there is the risk of pregnancy. You can reduce the risks but not eliminate them. The only way to tell is if you miss a period.