How many DPO for a +preg test?

Im wondering how many dpo everybody got their bfp? Im in the waiting period and trying my best to save the test i have in my drawer (LOL) ive been having some symptoms especially mild cramping throughout this past week with almost a week to go until period is due. today I found dark brown spotting and wondered if it could be implantation. I would be around 10 dpo today. thanks ladies :)