Missed Period???

Okay. So before everyone jumps down my throat, I have tested. It came back negative. BUT. I completely missed my period. But both tests I’ve taken have been negative. I’m not on birth control, and I’ve had regular periods since getting off birth control, a year ago. I feel like the answer would be obvious since both tests have been negative. But here I am, completely confused 😂 help a girl out! Lol