Yeah, I agree. The lines arent always very clear. They are nice to have as a backup but I think that I am going to buy the digitals so know what Im reading is accurate. I think I ovulated yesterday. Which was earlier than what I expected. I took a cheap one again just a few minutes ago and it looks negative now.
I used digital and got first smiley face (+opk) on cd15, then negative on cd15 (st that time I was testing once a day with fmu (the clear blue digis instruct use of fmu). Had alot of srious cramping on cd16 on both sides then major prolonged.cramping on left dide thst evening so decided to test -hadn't tested that morning as I had assumed I o'd on cd14 as cd15 was negative. well got +opk cd16 evening and think thst cd16 was the o day as the ovu cramping was so strong that night. tested again cd17 with fmu and got +opk but when i tested cd17 afternoon and again evening it was negative and mild to no cramping.
Sometimes your body gears up to o and you get an LH surge but no egg is released but your body keeps trying hence more yhan one lh surge. Thinking thats whst hsppened to me on cd14 and that maybe whats happening with you.
If you keep bding every other day fx you catch the eggy.
Good luck.xx
EDIT; first +opk was CD14 not cd15