OPK help!
The test on the left was taken around 8:15 last night, and the test on the right was around 9pm tonight. According to glow, my fertile window should start tomorrow. I have a pretty regular 28 day cycle (tomorrow is cycle day 11) and this is my first time using opk's. I know the test line needs to be as dark as or darker than the control line, but I'm wondering why the line was way darker yesterday? AF ended on the 3rd.
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