My boyfriend of 3 years and I have been trying to concieve for a couple months now. I use the ovia app to keep track of my fertility days and period. I'm not 5 days late, 18 dpo. I've taken two pregnancy test 2 days after my missed period. Big negative.. I've never missed or even had a late period. I have head aches, extremely tired at times I usually wouldn't be, creamy cm, and sore breasts. I feel like I should have a bpf! Is it possible to have bfn even if I'm pregnant and I'm just taking the tests too early?