Is headache, nausea and hot and cold flashes a sign of pregnancy?

It could be, but the. Sxs aren't diagnostic for pregnancy. Sxs 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. Take pregnancy test to know.