HELP!

 So i have two period apps eve and another one. The other one said i should have gotten my period a week ago but eve says I should have it by today. Still no period. I did have sex like ten days ago or maybe it was 2 weeks ago with my boyfriend , but he did not cum inside. Im not having any pregnancy symptoms.. What Should i do? Very stressed because im only 20 and cannot be pregnant right now😡😢😢 ( also i have been very very stressrd because i thought about it the whole time)