so, how early did your symptoms show up?

we bd'd on mother's day, which was in my fertile window. over the past couple of days i've felt nauseous every time i've eaten. i NEVER feel nauseous. i've thrown up maybe twice in my whole life (and that was when i was on drugs in the hospital for kidney stones). but, yeah... i've just felt generally weird.

i googled, and it looks like most people don't experience symptoms until 4 weeks pregnant or later. so, is this nausea psychosomatic? am i crazy? or has anyone experienced symptoms earlier than 4 or 5 weeks post conception?