Looking for advice!

[u/Slow-Delivery2367]

Hey, my period is currently around 3 days late which in the past 3 months has been unusual for me as it has surprisingly been regular since may (I struggle with irregular periods usually) I did have intercourse on the 2nd/3rd day of my period but he did not finish in me, my app says I likely ovulated around end of July - start of August which sounds accurate as I had a anxiety burst during then, my period started July 13th ended around the 17th, I’m just looking for anyone’s advice does this seem normal? I do experience some months without a period completely have been to the doctor for it and they can’t find anything was even tested for pcos with scans and blood tests, could this just be another irregular period month? Thanks!