Period late

Rebekah • 💍 Future Mrs. Meaders! 💍

I cant remember the exact dates of my last period, my dumb self forgot to make it. But I can narrow it down pretty close. So, as of today i am 29 days late, give or take a few days. But I have been a little over 3 weeks late before starting my period finally. I told my fiance that if I havent started by Sunday I am going to take a test. And I have been so tired over the past week. I slept 13 hours last night into this morning. Not sure if it's my crazy work schedule or possibly because I am pregnant. What do yall think? Am I over-reacting or over-thinking it?