
with these ladies... that's why I like to test a couple times a day if not 3 times closest to my O time. As the line gets a little darker I will test between 12-2pm and again between 8-11pm so I won't miss the surge. Most women the surge happens in the am, but DOES NOT show until the afternoon. So it's not like a hpt where you use FMU/SMU... it actually take a while for it to show in your urine.
It's 1) quiet possible that your surge happened already, or 2)you might not have O'd altho your body was gearing up to or 3) perhaps you're body is starting to gear up to O. I would go with either #1 or #2 as the possibility.
Next cycle you'll have a cleared idea....