I look a pregnancy test today: negative. My periods are always regular (28-29 days) and it hasn't come. So where is it? We've been trying to get pregnant for 6 months, and this month I decided to give ovulation tests a try, and I discovered that I ovulate late on either day 18 or 19. Would my late ovulation affect the levels of the pregnancy hormone in my urine causing the result to come up negative? I also found out that the test I used has a low sensitivity (40-50 mlU).