Soooooo I need opinions

So my period was supposed to come yesterday but my other <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> says it should come in 2 days???? So I got kinda concerned about being pregnant so I bought a pregnancy test and it’s negative. Does that mean my period is just late?????? This is my first time taking one!!! Does it mean that I’m not pregnant and my period will come?