Congratulations, mama! Based sa experience ng iba-ibang friends ko, ang positive PT kahit before delayed period ay usually accurate na talaga, ang hCG levels ay pretty detectable na by then, lalo na kung clear ang line! I'd suggest na mag-follow up test ka in a few days or go straight to your OB para sa blood test para ma-confirm 100%, but honestly sounds like baby #2 is on the way na! My friend rin had delayed period with her second and the PT was spot-on, kaya excited na kami for you.