What is going on?!

Samantha
Okay so yesterday I thought I had what was implantation bleeding. I had light pink spotting. My period is due Dec. 8. I ovulated on Nov 20. My cycle is pretty standard. 28 -29 days. My OPK was + and I had EWCM. I felt really good about this cycle.  We BD every day during my fertile window. Today I woke up with what feels like a light day of my period. It's not enough to need a tampon or panty liner but when I wipe it looks like my period minus clotting. But the thing is if this is my period it's over 10 days early and I have no other symptoms.  And I normally get CRAZY CRAMPS the first day of my period....Bad enough to take Tylenol and lay in bed. So what is going?!!! Is this implantation bleeding or my period. I'm just so upset!! If it's my period why is it so early?! ☹