Tmi help? What is going on with me

Samantha
So 3days ago (11days till my period) I started spotting.  But hardly anything at all. Just a little brown only when I wiped. It only last 1 1/2 days and only a few times. Now (8days till period) same thing. My boobs have been hurting since the spotting started. 
My boobs usually hurt 3-4 days before my period but I have never had them hurt or "spot" like this, this soon. 11 days before my expected period isn't normal. 
Is it possible this is implantaion bleeding? Or just an early period? I have pcos and an early period NEVER happens. I am so confused