CD 48 and no AF

So cd48 no AF,

Period is 14days late and 2 tests show negative.

Non of my usual signs for AF showing and we was <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a>

No changing to my life style so what's happening 🤯

Think will have to call doctors 🤔