I have been feeling queasy and have been having headaches and feeling like a knot in my lower stomach could i be pregnant? ttc had sex a week ago

These symptoms: Would not be from sex a week ago. Early pregnancy sxs can include: no period, breast swelling ; tenderness w darkened areolas, thin, white ; milky vaginal discharge, fatigue, ^ urination frequency, constipation, bloating, heartburn, backache, cramping, headache, food cravings or aversions, ^ sense of smell, enlarged waist, feeling faint/dizzy, mood swings, ^ gas, insomnia, gagging more easily.