Popped cyst or implantation??

Carly
I was obviously diagnosed with PCOS, periods were normaling out in June and July then August was weird,pushed into September. Had my period on the 13 and now I'm spotting today...discharge with streaks of red. We were busy most of last week after my period. So is it cyst or implanting? If I am pregnant a test would show positive until the 11th, I believe.