My son's girlfriend has taken a variety of pregnancy tests in the last week. Last Thursday, a brand I ordered off line showed 2 negative results, and 1 with faint positive, thought maybe they weren't reading correctly, or she was reading them incorrectly . So she then took two EPT certainty (actually says PREGNANT or NOT PREGNANT). Both clearly said PREGNANT. She repeated, a 3rd test, the next morning, again......it clearly said PREGNANT! She promptly made an appointment at the WIC office, but the test they performed showed negative?? Again, she went an bought another EPT Certainty test, 4th time now!!..........which again says PREGNANT?? Could it just be too early for some tests?? Her last period (~memorial day) was only light spotting for a day & a half. I recommended she have a blood test.......but not sure "how much" pregnant you need to be (haha) before a blood test would show positive.