Yes. You should assume you are pregnant. The exact color of the lines is not important.
Though a positive result should not change for several days, a negative result may change to a false positive within minutes after the end of the testing period, which would not be an accurate reading. It is always best to read the results at the 5 minute testing period and then discard the test to avoid confusion.
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Pregmate App - Ovulation Tracker, Fertility and Period Calculator
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