my bf and I had sex on 8/26/17 (Saturday) unprotected, and on Monday and Tuesday I realized a dark brown discharge I thought it was my period coming on early but once I wiped that was it. Then on Tuesday had some more dark brown discharge and also light pink with very minor cramps. My period is due today and absolutely no signs of my period coming on I took a test on Sunday and it came out negative could I be pregnant?