Me in my boyfriend has been having sex. Hes been coming in me for about 5 WEEKS But my period has always come on the same date always around the 15teen but for the pass two periods i had came really early on the 4th my last period didnt really hurt just the same pains that most girls get but this time it hurts really bad in i just dont understand why my to last period came early in why the last one hurts so bad HELP PLZ THANKS