3 days late ??

Stephanie

Hello just need some help. I’m 3 days late which is not like my AF. Usually It’s off a day but never 3 days. I don’t have any symptoms for AF or possible pregnancy. I did take a test but it said negative. At this point i just need to know what to do next ? Is it possible to have a negative test then a positive test ? Or should i continue to expect Aunt Flo ?