Has this happened to anyone else?

I'm a little confused here. I did have unprotected sex with my boyfriend a couple days before my fertile window. Then on the first or second day of my window I had pinkish discharge for one day. Then after my fertile window ended i bled a little. I wouldn't call it spotting because it wasn't just a couple dots. Then a week before For period was supposed to come my breast started getting sore which is usual so I didn't worry. I was supposed to get my period on the 21 and it still hasn't come. I took a pregnancy test on the 23rd it came back negative. I took one today and it came back negative and I haven't experienced any increased discharge. I am going to consult my gyn but I would just like some opinions or know if this has happened to anyone else. 
Also I wasn't worried about my breast hurting because I was pregnant before and my symptoms were completely different. My breast didn't hurt at all which was unusual for me which was my first clue that I knew I was pregnant and I was cranky all the time, always sleeping, and increased discharge.