12 days late BFN 🤦🏼‍♀️

Al

So I'm 12 days late, and have all the same symptoms as I did when I was pregnant with my son, nausea, tiredness, heartburn creamy discharge and a lot of it, soar hips and boob, but BFN. My sister keeps telling me it's coming out negative because I'm breastfeeding still but I don't know. We just want to see that + BFP ugh.