Not long ago i had intercourse with my boyfriend but we used a condom, my period was meant to be due on the 17th i think cause last month my period wa slte and came on the 17th, on the 18th i took a pregnancy test and it says negative, and i show all signs of getting my period, like my breast hurts a bit, back pains and sometimes cramps, like how i always but im still waiting, just two days ago i've been gettign thick discharge.. so im not sure if im possibly pregnant or my period is late