Help bloody discharge

About two or three weeks ago I had some bloody discharge it was light pinkish and red tinted and it was in some clear cm so I took a opk the next week and it was + and I took another one along with a pregnancy test the next flowing week the hcg was - but the opk was + and I took another opk today bc I wanted to see what it'd be and yet again a + what could this mean and also my period is due tomorrow anyone els ever done this and have something good come of it