I used one of these tests at roughly 11/12 dpo, and it had the faintest of shadows on it, very similar to how yours looks, so bought an acutest early sign test, and took with Fmu, and it had a faint but definite second line! The next day I used an first response early test and got a dark line, so I'd pick one of those up if you can, I don't think these little stick ones are as sensitive as they say they are! Good luck!!