Just thought I would tell you about my experience. With my second baby (who will turn 2 in a couple of days), I just KNEW I was pregnant. I took 3 home pregnancy tests - because that is all that came in the package - and they were all negative. I had my annual coming up a week later and told my doctor what I thought so she ordered a blood pregnancy test. They drew my blood and called me back a couple of days later and said I was not pregnant. Two weeks later, I took a positive home prenancy test! When I went back in to my doctor, she said she couldn't believe that the blood test didn't pick up the hormones, but it just must have been too early. I knew I was pregnant all along though. ;)