Negatives and confusion

Alexa

No period this app and 2 others say I am due for aunt flow today ... while another 2 apps say I am not due for aunt flow till tomorrow πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜­πŸ‘Ž

Well

So far no period today and I got a BFN ... so anyone have any experience !???