Confused opks?

So confused!!! So I took a ov test on 4/25&4/26 Which was cycle day 9& 10 where I got my +. It was a little lighter the next day and then on Monday 4/27-Friday 5/2 I took clue blue advance digital and got all blank O. Well on sat evening bc I was drinking thought I would test again and then I got my peak smile face. That lasts for 2 days and then this mining I decided to opk again and got another +. What does this all mean? Today is cycle day 21. I usually get my +on day 14-15.