Anyone using the MaybeBaby Ovulation Tester?

KJ • 26 | Married | Expecting #2 in August!
I tested yesterday morning but forgot about it all day and left it on my bedside table. I only checked the results last night (pictured below) and was wondering if leaving it out for so long could have affected the results? My doctor said I wasn't ovulating but this result (ferning) says I am! :)