BFN, but no AF


So my period was due yesterday. I've had some cramping/ backache, nausea, and some slight dizziness. A day late and AF still isn't here. Cervix is high, soft-ish, and closed. But I got a BFN when I tested today.

I'm still holding out hope that maybe I just tested too early. Sooo anxious and frustrated.

Has anyone else been late and not gotten their BFP right away?