7dpo, still too early to test???

Veronica • Proud single Momma of 2
I'm 7dpo i have watery cm. Got my progesterone levels checked today hope everything went well. I really wanna start testing but I'm scared it might be too early and i don't wanna get a bfn !! ? what's the earliest i can start testing. Wether i might get a bfp????