Have you taken another digi? It should really be accurate by now and leave no room for interpretation. Unless you fail HPT's! But your blood test will certainly confirm for you soon enough!
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As for the bleeding, it is quite common to experience light bleeding/spotting around the time of your expected AF. This bleeding is normally hormonal in nature and the pregnancy can go on to be perfectly healthy.  Bleeding at other points in a pregnancy can also be normal, though, later in pregnancy it can also be a sign of something to be concerned about and should be checked out.Â
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It is also quite common to miscarry around the time of expected AF. A chemical pregnancy occurs when not enough hCG builds up in time to signal to the corpus luteum to remain intact and not shed the uterine lining. Otherwise it disintegrates, the lining is flushed, and the embryo is flushed with it. More and more chemical pregnancies are detected these days with modern, sensitive HPT's. Loss of pregnancy symptoms can be an additional sign of miscarriage, or could be caused by fluctuating hormones as your body adjust to being pregnant. Or if you are indeed much farther along than just a few weeks, then you could be experiencing the ease of symptoms toward the end of the first trimester.
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I'll be anxious to hear the results of your appointment!  Â