Ok so.I had sex the 12 of August then my "period" came on the 16 witch was not normal the first day it was a gush the send day it was a half of pad then it will only be there when I wipe not in my pad it when from bright red to bright pink to a orangey color it lasted 5 days my periods usually last 7 days and are heavy unlike this one then I had.sex again 3 days aftet the little bleeding can I b pregnant