13 DPO...

Niv`s
Hello ladies... 
I've got a question for you guys. Ok if I'm 13 DPO and AF is due tomorrow the 10th is it to early to detect HCG in my urine? I took a test just a bit ago and it was a BFN. My boobs feel sore almost as if they are bruised but my  nipple's don't hurt? What are you thoughts ladies? Should I wait to see if AF comes tomorrow and if it doesn't when is a good time to retest again?