Hello, and i hope i can help you today. Pregnancy symptoms vary widely between women, and many of the same symptoms people associate with pregnancy like spotting, breast tenderness, headaches, bloating, nausea and mood changes can also been caused by hormonal changes that cause irregular periods. Therefore, there is no way to know if you are pregnant based on symptoms, and the most common sign of pregnancy is missing your period. Furthermore, your pregnancy hormone levels are too low at 5 days post-conception to cause any side effects. So I suggest performing a urine pregnancy test if you miss your period. If you are not pregnant and continue to have irregular spotting, an examination by a gynecologist would be prudent to help diagnose the reason. I hope I was able to adequately answer your question today and that this information was helpful. Best wishes, Dr. Brown