Late?

Sooo i know periods are irregular but I’ve never been late , like ever. I’m only 2 days late but mannn it’s stressful. 🙄 not knowing when I’m gonna start, when I’ve always known, Lordy. I’m 16 and ive had my period for almost 6 years. I’m a Virgin but i have been stressed lately so I’m thinking that’s the reason. Opinions ?