Has it ever happen to one of you being late, test was BFN and retest was BFP?

Laurie • 23. Québec canada 🇨🇦. Speaks french,english. Married since september 2016. Pregnant with baby #1.Mila💕 october 2017.
So I'm 4 days late, tired, dizzy, nauseous , sore boobs and BBT still high. I tested yesterday and it was negative , I've never been this late... So I'm wondering , has it ever happen to anyone to be late and test but the test is negative and retest later (days or different brand of test) and end up pregnant? 😔 I'm confused here. Please help. 

Vote below to see results!