hi,am 18 years old my boyfriend and i had sex about 2-3 days before my period,he came inside me,but normally i would be having heavy period but this time its light with normal period cramps that last for a day,which is unusual,i took a home pregnancy test and it came out negative,i don t know what to do i am worried and my boyfriend say i shouldn t,can u please tell me whats going on???:(