Is it possible?

I apologize if this has been asked before, I'm just so confused! AF is supposed to come on 10/31 and this is the result of an opk I used this morning. I admit I'm not very religious with these but for the last few days I've been testing since my cycle has been wonky after birth control. The last few the lines were basically nonexistent and now this. Can you ovulate a week before your AF is due? Thanks for any help you ladies can give!