Pregnancy symptoms

Before you found out you were pregnant how many dpo were you When you felt flu like symptoms. I remember feeling them with my daughter but I dont remember when I felt it. I came home early today because my pt that I take care of smokes like a freight train and she was also cooking fajitas and I couldn't take it anymore. The smells made me sick as a dog !!! Right now I'm 9 dpo and I believe it's too early to be feeling this. I dont know. What do y'all think ?