Bfn 1 day late on dig

Beth
Took a cb digital w week estimator test this am at 1 day late. ... I'm never late fyi... like clock work. Showing not pregnant. Cramping as if af is about to show but idk what to think. Should i retest w a frer or wait it out? Anyone had a neg on this test then few days later pregnant or getting bfps on others when this says no? Thanks