Question: how soon after implantation do you feel fatigue?
Answer: 6 to 12 days after conception: Implantation of the fertilized egg may cause cramping. 7 to 14 days after conception: Breasts may feel swollen, sore, tingly and heavy. 7 to 14 days after conception: Fatigue due to increased progesterone, low blood sugar, and low blood pressure.