** TMI DISCHARGE ** What's going on with me

Right on Saturday I had a bit of cramping, and yesterday I had a bit of spotting, no cramping or spotting today but my breasts have became extremely sore today! My discharge has went like a wet creamy colour I took a test and it's negative my last period was a weird period it was very light what's never happened before. I'm on CD 30 today, my period is due in 2 days what could be going on with me? I have never had any slight line on a opk and I've just taken one and there's a line there I've never had a line like that ( ino its still neg ) the pregnancy test next to it was took at the same time.