Clear blue opk help please

Jade

I have been using CB digital opk, the one with the flashy smiley.

I got flashing smileys for 2 days, then stopped using as I ran out for 2 days and then tested again.

Anyway, when I had i had the flashy smileys the lines were very light.

Today (2dpo supposedly), I have a circle but the lines are the same?

Does this mean anything?