Negative hoping and praying for a positive

brieana • ♡♡my hubby 3 kids and 4 angels - ttc baby #8
Okay here goes! I am now 12 days late for af and there is still no sign of it all tests ive taken are negative so im at a loss on what to do. I want to get pregnant so badly but i cant without having my period. Is it possible i could still be pregnant even though everu test is negative i am 3 weeks post ovulation