I've done bucket loads of these tests before. When I get my LH surge the test is usually blazingly strong. On CD 13 I had a close positive and I expected it to be stronger the next test later that day but it was faint again. CD13 was also much earlier than I was expecting a positive OPK. I don't pay as much attention to the numbers associated with the pictures because I know that depending on light etc they will read differently to the same test result. Anyho, was that likely to be my surge? I did feel as though I was ovulating but didn't believe it. I should have ovulated today based on my past charting. Feeling a bit fed up.