Ahhh I understand lah, that's scary! A few of us tried tracking like that and honestly pregnancy tests boleh be finicky, sometimes it's the urine dilution, sometimes the test itself, or maybe timing je yang off. Since you're tracking DPO and the lines have changed, I'd really suggest doing another test in a couple of days or better yet, go see your doctor for a blood test (beta hCG) which is way more reliable than pee sticks, especially when you're confused like this. The waiting is stressful I know, but a proper blood test will give you a clear answer instead of wondering!