Opk questions..please help!!

I never got a positive lh surge but blood tests confirmed I ovulated. I'm thinking even though the opk box says lines need to be even for positive I feel that when I have two lines even if they aren't matching in color I feel that is when I'm ovulating. First photo was yesterday, second is today and the second line is way more faint..what do you think? Anyone out there that never got positive lh surge but then got pregnant?