I had been tracking my temperature for months. Planning to try in August. My peak day, according to ovulation test, was 8/26. Took a pregnancy test, which was negative, and got my period the same day. I was anticipating my period that day, too. Figured I wasn't pregnant, but my sister-in-law said the same thing happened to her. What she thought was her period was actually implantation bleeding. If it is my period, it was a day shorter than normal, and I'm still spotting. Should I waste another pregnancy test??