Worried, 34 days late.

Hey ladies, so as you can see I'm 34 days late. My period is not abnormal at all. Never missed a month and does change a few times around but not to be missed. Yes I have a partner and we have had unprotected sex. But I went and brought a few pregnancy test and so far three have resulted in not pregnant.

The fact that my period is 34 days late is starting to freak me out not sure what to make of it. Or what should I do. Any advice or reasoning why this might be happening ?

Also why is <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> determining I have a one percent chance of pregnancy , am I missing something ?