Samar-samar tapi ada garis biasanya still positive sign, especially kalau dah 4 hari lewat period! First urine memang paling concentrated so it's the best time to test, tapi sometimes kalau early pregnancy the hormone levels still building up so the line jadi faint. A few of us did repeat test a few days later and dapat clearer result, or boleh try afternoon urine if morning one too samar for your peace of mind, tapi honestly, 4 days late + any line appearing = kena go see your doctor to confirm with blood test lah, sure-sure way!