False negative ?

Question

3 days past my period and negative pregnancy test. Could it be a false negative?!

Answer

There is such a thing of false negative, although tests are reliable and almost 99% accurate, getting a false negative can happen but it is rare, but it isn’t “impossible”

Answer

False negative isn't really the correct term. If negative, its not usually due to a faulty test but rather one of these scenarios: 
1: you're not pregnant and the test is accurate 
2: you're testing too early,  and the egg hasn't implanted yet (if testing 12DPO or earlier)
3: the egg has successfully implanted but there isn't enough HCG yet to be properly detected.

Answer

You could have ovulated later than you thought, stress can throw off your period, COVID vaccine can throw off your period many other things can cause a delay in period.

Answer

Yes but also 3 days late is just normal variation

False negative ?

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