Go to the doctors. They will let you know the best approximate conception date and due date
Sperm can live up to 3 sometimes 5 days after having sex.... So if you had sex on the 4th and you ovulatied around the 4th I'm sure that's when you got pregnant. If questions call your doctor.
I believe i got pregnant around that time too . But on Wednesday i go for a vaginal ultrasound. So i giess ill find out then . I was just curious . But thanks