Positive opk 2 days apart

Holly ❤️
I am confused...
I took a opk two days ago, and it was VERYYYY positive. Took another one yesterday, it was very negative. Took one tonight, it was also very positive! 
I know not to retest after the first positive, but I just had a feeling to test tonight...
So when exactly did/do I ovulate? I am also still havin some ewcm. The day of the first positive, I had significant cramping. The next day(when it was negative), my nipples were very sore.. And they are sore tonight to.
Anyone?!?! Please help!!!!