By "the test," you don't mean the ovulation test, do you? If an ovulation test, how did you know you ovulated if the test came back negative?
If you are saying that by some other sign you think you ovulated but an ovulation predictor test says you are not ovulating, then probably the other signal that indicated you were ovulating, is wrong.
If you mean that after you knew you were ovulating on the 14 16 17 you had sex, and now it has been two weeks and your took a pregnancy test, and that is the test that coming back negative -- not every month having sex creates a pregnancy. I think the percent is about 20%-25% in a couple with average fertility and having sex at the right time.
Your phone tracker does not know when your ovulation is, it merely knows what the "average" ovulation is, an amalgam of many women's data. If you're not seeing an ovulation test come up with anything that confirms your phone tracker, keep testing.
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