How early did you get pregnancy symptoms?

Katy • Momma to 1. 🌻
It's definitely possible that I could just be over thinking things but I'm wanting to know the earliest you had any symptoms?!
Today at work the church was cooking roast and baked potatoes and the smell was terrible to me when it usually doesn't bother me. The cleaning lady made me gag with her cleaning supplies. My lower back has been killing me. 
Am I looking too much into it or is it possible I have extremely early symptoms?