Opk's getting lighter instead of darker?

[Aims13h]

This is only my second cycle ever using opk's. I started on cd8, took 2 tests on cd 10 (am and pm)....my test on cd9 is much darker than 10 & 11.
Surely this wasn't my +, was it??? I'm so confused

 

[tamithomas]

The + could have happened in between 9 and 10. That's the annoying thing with opk's, the surge can happen at any random hour. Usually when it starts to get lighter it means the surge has happened. GL!