Is it possible to have early pregnancy symptoms two weeks after sex?

Yes: Although it may take longer for the hcg to get to high enough level to cause symptoms.

Sometimes: Usually no sx's that early but can go on to develop breast swelling & tenderness, food aversions, nausea. Other sx's that occur in pregnancy include: darkened areolas, thin, white & milky vaginal discharge, fatigue, ^ urination frequency, constipation, bloating, heartburn, backache, cramping, headache, food cravings, ^ sense of smell, enlarged waist, feeling faint/dizzy, mood swings,^ gas,