You can start to feel pregnant as early as 1 to 2 weeks after conception, which is around the time the fertilized egg attaches to the uterus. Early signs that may be felt include mild cramping or spotting (implantation bleeding), breast tenderness, fatigue, and changes in appetite or nausea. These symptoms vary widely among individuals; some may notice them before missing their period, while others may not feel any signs until later, around 4 to 6 weeks pregnant. The missed period is typically the most reliable early indicator of pregnancy. Hormonal changes during this time cause these symptoms, with levels of pregnancy hormone (hCG) detectable by tests roughly 11 days after conception or around the time of the missed period.
