I tested today 9 DPO I realize this is SUPER early.. but couldn't wait.. Showed a white line immediately where the pink positive line would be, after 3 minutes still there.. after 30 minutes gone...
i wouldnt trust the white line (ive seen this too and did fall pregnant though). if you took another test it probably wont be there. (thats what happened to me).
Its a bit early i got my first faint positive on 12 dpo - good LUCK!