Wtf is going on

Top two test was this morning and yesterday morning. Right after the positive , I got a BFN with the same urine that I got the positive with. All with FMU . So I just took a ovulation test and it's blazing . Idk what's going on. How come I got a strong positive with one test , and BFN with another test with the same sample. How does this happen twice. What's the odds of two faulty test. Could it be 😭😭 I'm not even excited anymore.

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