Is 9dpo too early to have signs of pregnancy? i have nausea, backaches, and cramps.

Pregnancy Symptoms: Early - 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.