How early can pregnancy symptoms start?

Conception: Technically; as soon as conception occurs one's body will begin changing on every level. Some women can even tell the moment of conception; believe it or not.

Symptoms: Classic pregnancy sxs usually begin when period is missed or thereafter (6-8 wks). Sx’s can include: tender /swollen breasts, nausea or vomiting; lack of period; ^ frequency of urination; headaches, insomnia, fatigue. Moodiness, mild cramping, food cravings & aversions; passing gas; enlarging waist line & ^ white, milky vaginal discharge. Some times sxs begin prior to missed period.