Confused...

My husband and I are TTC our 2nd. I ovulated on March 26th and am now 2 days late, my nipples are sore, I have heartburn, moody, and my clothes are fitting tighter. I took a pregnancy test last night and it said negative. I'm so confused! My husband and I thought for sure that I was pregnant. Has anyone experienced showing a negative pregnancy test when they were pregnant? What about 14 days after you ovulate like mine?