On my last day of ovulation I had sex, which was last Saturday evening.. The next 2 days I became sick with flu like symptoms of chills, aches, slight runny nose, but it went away. And everyday my breasts are appearing larger. Slightly tender. My period is supposed to start on Friday this week. I know flu like symptoms immediately after conception can occur but wondered if anyone else experienced this? I'm very moody and my appetite has increased. But it's only been 8 days. Am I overreacting?