I have been having unprotected sex with my boyfriend. On Oct. 19 I got some brown discharge which lasted about 3 days but no sign of period, later on that week I got some very light pink spotting that only lasted that day. I believe I am 2 weeks late, I took a pregnancy test and it said negative but Im not sure if I should retest again & if so when? Also what could be an explantion for what this could mean...