UPDATE: Spotting got darker. But not like blood red. Cramping. I ended my period 8 days ago though?

My last period was November 23rd to December 1st. I was checking my CM this morning and noticed pinkish blood. Very light. Im confused and don't really know what this is. Im suppose to ovulate today. Took both a pregnancy test and ovulation. Both were negative. I have other symptoms.

Constipation

Sore breasts

Pinkish blood

Headaches

And cramping in my ovaries throughout the day.

Can anyone help me as to an idea of why Im spotting or maybe Im testing to early???