Implantation spotting (TMI)

I apologize in advance for the TMI but I'm hoping someone can give me a little advise/interpretation.
My period is due next Monday (11/23) but yesterday I had a some very light pinkish-red blood when I whipped. Since then there is nothing else when I wipe but if I insert something inside myself (i.e. Toilet paper) it comes out with some brownish discharge. 
I do have some cramping, backaches, dizziness and I'm tired with very sore boobs. 
Could I actually be pregnant and expierencing implantation spotting.