help!

Lexi
So I had my miscarriage at 12 weeks on august 28th , 2017.... we tried and tried to get pregnant months after and then eventually just stopped trying so hard 
Fast forward time. We don't talk about it much or think about it just have sex for love and is and now I am about 20 days late on my period... I have taken 3 tests and all negative.. the most recent I took was last night.. I feel pregnant but nothing is showing?.. any advice or somthing?...