What is going on?

Heather

Help me!

Two days ago (the day before AF was scheduled) I had a spot of pinkish blood when I wiped. Yesterday I was supposed to start my period but only had lots of clear CM. Today, I am cramping (mostly centered on the left side) and have had some dark brown disharge. Usually the dark brown stuff happens at the end of of AF, not the beginning! All my FRER tests look negative despite having several 'symptoms'.