Does breast tenderness mean ovulation time? Glow assumes my peak times are today, tomorrow, and the next day. I had sex like 4 days before ovulation, 2 days before, the day of ovulation week, and the day before the highest ovulation day. My breasts have been sore for two days and I wasn't sure if it was a sign of ovulation. My period doesn't start til the 1st so I know it's not that.