Eh mcm mana lah positive OPK tu? Kalau test line sama gelap atau lebih gelap dari control line, tu positive, means ovulation surge is coming, so best time to try! Tapi kalau test line lighter than control line, tu negative pa lagi. Grab a few sticks and test for a few days during your fertile window, because hormones tu fluctuate and sometimes one test je tak cukup clear. A few of my mum friends said they test twice sehari during peak fertile days to catch it properly. Kalau still blur or worried about reading, boleh check with your gynae, they can confirm with ultrasound.