So since Im guessing I had positive pregnancy tests then they faded out and I started bleeding on CD28, it was a chemical pregnancy. So do you count the first day of bleeding as CD1? I was trying to get an idea of when I would be ovulating! My cycles before our daughter were every 28 days but after her, they were 25 days. So maybe they will go back to 28 now and Ill ovulate a couple days later than I did before the chemical?