Am I 6 or 7 dpo??

🍓Lin2105🍓 • Hi I`m Linda I'm 25 years old I have a little girl who is 3 and I found out I'm pregnant with baby number 2 on the 4/11/15 after 4 months ttc. We are so excited!
I ovulated on the 9/23 does that make me 6 or 7 dpo, do you count the day you ovulated??x