Opk help?

Brittany

This is my first month using OPKs. I just bought them on a whim. I’m “supposed” to ovulate Saturday so I took one today thinking it would be positive but it was way negative.

What’s weird is I always feel ovulation and it feels like I am ovulating today…. Sharp crampy pains on my right side.

So is it possible I already missed my surge or should I continue to test?