Hi Chris,
Yes, there are women who detect pregnancy very early using these tests however the later you test the more likelihood of an accurate result.

With my third child I didn't get a positive until the day after my period was due. With 2 of my pregnancies I received a feint positive around 10dpo. Each woman and each pregnancy is different...

On average pregnancies implant around 5 - 7dpo. However, this isn't set in stone and some pregnancies will implant sooner and others later. Your body will not have any detectable hcg until implantation has occured. Remembering that conception occurs in the fallopian tubes and then the cluster of cells that are a baby travel down to the uterus and embed. Not until this embedding or implantation has happened will there be hcg. It then takes about 36 hours for hcg to be detectable in urine (it is detectable in your blood sooner). Then the hcg has to reach a level that the test you have chosen can detect.

So, you can see from all of that you would be very lucky to detect a pregnancy as early as 9dpo and more likely to detect around 12dpo even with the early detection tests.

I have fingers crossed for you for a positive soon.