Sis, 8 days delayed is definitely enough time for a PT to show positive kung talagang pregnant ka, pero sometimes the test itself can be faulty or the hCG levels are still low, a few of us tried retesting after 2-3 days and nakita na namin ang line! Since you've been trying for a year na and your period is usually regular, I'd really suggest making an appointment with your OB para ma-check properly kasi sila ang makakagawa ng blood test which is way more accurate than PT. Fingers crossed for you, mama, the waiting game is the hardest part talaga!