Pregnancy symptoms gone?

After the positive pregnancy test, I felt very nauseated, very uncomfortable cramping, fatigue, bloating and sore breast. I only felt it for a day (wednesday). When I woke up thursday, I felt very normal almost not pregnant. The only symptom left is my sore breast which hurts more during dawn. It's now Sunday and still no other symptom except for the sore breast.

The doctor we called won't accept before we reach out 8th week and we are only on our 4th week. Should I be concerned?

Update:

Nausea is back after a week.