...going to be late ? so i had sex LAST friday & i knew my period was going to come on b|c me & my best friends came on the same day which was feb 24th. her's only lasted for 4 days, but mine usually last for 6-7 . so i was technically it went off on the 3rd of march .. to be a month, would it start the 3rd of april, or would it be late because i lost my virginity last friday .