9 days later!

Hello soo I’m 9 days late no positive test no symptoms of period! All I feel is a little breast tenderness and l am really tired for the this welll yawns all day and pressure or a full ness in my belly or lower abdomen!! My periods are always regular I’m 34 so it’s been normal for while now usually start 2-3 days early and now randomly nothing and 9 days late what do you guys think is happening? Soo today would make me 23 dpo