Prefer to use classic tests

I thought to myself that this digital pregnancy test is convenient because you do not have to interpret the result, but can be read directly in words on the screen. Since I've done several tests over the past months, the results were mostly reliable: "Not pregnant!" But now I'm actually pregnant, yet the test 'Not Pregnant' displayed at the cessation of menstruation. But since I had a feeling you might be pregnant, I bought another, non-digital pregnancy test from the house brand of a drugstore. On this appeared directly two lines and this test was right. I suspect the problem lies in the fact that the digital pregnancy test until a certain limit of HCG value the 'Pregnant' result indicates. Especially in early pregnancy (if the rule fails) is not every woman this hormone concentration already so highly pronounced. In a classic test, however, a fine second line may already be in early pregnancy can be seen, so it can be assumed to be pregnant or can verify this a few days later by another test or the doctor. Personally, I'll grab the basis of this experience only to traditional pregnancy tests in case I need a back.