Opk? Positive? Help!

[Lucy_Jane]

Hi. This is my 1st time using opks. Im on cd12 of a 26-28 day cycle and have been testing since cd10. They've all been negative so far, including this mornings. But ive had a few twinges in my left side this afternoon so just decided to check again. The line is very clearly there but not as dark as the control line. Does this still count as a positive or does it just mean i'll likely get my positive tomorrow? Thanks 🙂