Late but BFN?

I am a day late which is strange for me as I’m either a day early or I start AF the day I’m due in the afternoon. I’m getting odd cramping which I get when I’m on my period but I never get symptoms before I start which is kind of annoying because I never know when I’m going to come on. I just know it always happens in the afternoon 😂

I’ve taken tests and all are negative! Anyone else had this and ended up with a positive a few days later?