I'm not sure when I ovulated as my scans have dated me a whole 7 days ahead of what my last period stated, but I did get my bfp 6-7 days before my period was due, which I believe is very very early for most people.
From everything I've heard, read and researched though 10 dpo is so early I'd be surprise if he majority of pregnancies show up on even the most sensitive tests. Try again in a few days!good luck x