11dpo pregnancy?

Kaylee

Can someone tell me why a clinic would give me a BFN, but I got this.

I have had 2 kids. I know I’m pregnant again. My thing is, I have to track my cycles closely due to my medication I take to prevent it. But I know I am pregnant.

Could someone shed some light on why their tests do not show what mine have? Or even what I am missing?

I have tests that start from 5dpo and 8-11 is where everything got darker.