Well there's really no saying which day a test would be 100% positive. I took a test at 12 dpo and it was bfn but the test I took at 14 dpo was a bfp. :) If you want to take a look at my chart you can see that I had brown spotting on 11, 12 and 13 dpo and was completely confused and sure that AF was coming. Good luck!
Absolutely not. :) I had the brown spotting, occasional nausea and sore bbs from about 11 dpo on. I would test and if it's a bfn then wait a day or so and test again. I have friends that tested bfp at 8 or 9 dpo! It just doesn't work for me that early. It totally depends on when the baby implants. If it's an early implanter then than your body starts making hcg that much sooner and by 11 dpo you should get a bfp. :)
