Late period

Andreanna

wondering if anybody is going through this so I have 2 <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> on my phone Flo app says I’m 2 days late and <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> says I’m 4 days late so I went and had my yearly exam yesterday and I was exposing to my obgyn about what’s going on and so we did a pee test and it came back negative and I was hoping that my period on today and still nothing is there’s a chance that I might be pregnant really don’t make any since to me cause my period never acts weird or do anything like this help me understand please!