FRUSTRATED

Thamires • Brazilian, traveler, in love. Married 04/08/2017. Firsr baby due Feb/20
I'm so fucking frustrated this month. I've been officialy on TTC for 4 months, but me and my SO have been out of birth control for almost a  year. 
I've done a medical check up, just to make sure everything was alright (no fertility tests, just CM test)
She said I had nothing to be worried about. 
But this month I used a German Pre Seed, since I notice my CM doesn't go to egg white every month.
I've been nauseated, and tired, but every fucking test come negative! I know I could still be pregnant, but damit! I'm so frustrated!
Some women have 6, 10 DPO their BFP, how long do I still have to wait to know if I'm really or not?
This anxiety is killing me!!!