Can I ovulate with no period?

I have PCOS, however the last 8 cycles my period has been almost spot on, give it take like 2 days..which is great for me. WEL this cycle, I still don't have my period is 9 days late. 
  I took a test like 3 days ago and it was negative. And had spotting 2 days ago. 
 What I'm wondering is, could I have ovulated without a period? 
And could that spotting have been implantation bleeding? 
I'm so confused.