Took first opk 09/01 at 8am (low fertility)

2nd test stick was 09/02 at 10am (high fertility/flashing smiley)

3rd test stick was 09/02 at 7pm (high fertility/flashing smiley)

Second picture;

***9am testing (09/03) high fertility/flashing smiley, NOT PICTURED!!!!*****

9pm testing (09/03) 1st stick

1am testing (09/04) 2nd stick

*Flashing smiley still from both 9pm and 1am testing.

I feel like I have somehow missed my peak because the lines look lighter in color although this all test sticks from cb digital advanced opk... do the lines mean anything?