1. Breast swelling and pain: Just 6 days into pregnancy, many expectant mothers will feel the symptoms of breast swelling and pain. This is because after pregnancy, hormone levels in the body change, causing the mammary glands to gradually enlarge and develop. This process may cause breast tenderness, sensitivity, and even some pain. It is recommended to wear a comfortable bra to avoid bumping and squeezing. 2. Nausea and vomiting Nausea and vomiting in early pregnancy are very common symptoms, especially in the first 6 days of pregnancy. This is because hormonal levels in the body change after pregnancy, causing digestion to become sensitive and easily irritated. It is recommended to drink more water,