Sorry, I just assumed with you saying 10 days left, you were having late ovulation and if so, AF would turn up later than normal. My mistake!
What they don't tell you about the highs on cb digis, is that the holder is programmed to display a flashing smiley once it first appears, until an LH surge is detected, even if there is no oestrogen surge or if the LH surge has been and gone. My record was 14 flashing smileys before running out of sticks. This was sent to me in an email from them last cycle. Someone else, can't remember who, got the same standard email too.
The only time I got a solid smiley was in feb and I decided to test at 4pm instead of FMU. I think they are fine for perfect text book cycles, but not for other ones. Going through 20+ test sticks and still not getting a solid, just cost me too much!
The Internet crap on the other hand, worked perfectly. I think it is just an OPK conspiracy for us ttcers 