Am I pregnant?

Silvia • Mother of three beautiful boys! Currently pregnant with my fourth and last baby! So excited! Love my hubby! I couldn't ask for anything else in life! God has made everything possible!
My last period was March 13, 2017. I had a pregnancy test done on Saturday, June 10 and it came back negative. What's going on with my body? I have 3 boys and my tests always came back positive after 2months and a half of being pregnant.