Pregnancy Test

I'm 2 weeks delayed then nagpt ako nung 9 days akong late and it came up negative. Then ngayon I'm 2 weeks or 13 days delayed and natake ako ng PT within 3-5 minutes according sa instruction it came up negative after an hour nagulat biglang may faint line. Is it negative po ba or yung line na yon is evaporative line lang?