Negative blood test but no period?

So I had a blood test done two days before my expected period, but my result was <1. Period day came and went with no sign of AF, just some brown/pink spotting here and there (never bright red).

Has anyone experienced a negative blood test before then ended up actually being pregnant? My bbt is still well above my cover line and my cervix is high and soft (I know cervix position isn’t the most reliable method but I still check). Thoughts anyone?