Going crazy

Hey ladies, 
​I need some huge help, I took an opk on 06/15 and I got a positive, then 06/16 all day was negative (took 2 opks) and today 06/17 again I got a positive opk again ? What does it mean ? I am really confused  
​First opk is 06/15
​Second & third are from 06/16
​And fourth opk is from today 06/17 
​My opks don't get any darker than that, I have never had a test line really dark than the control line