Breast changes can begin very soon after conception. "That's when estrogen falls to its lowest levels in the menstrual cycle, while progesterone is still quite high, causing fluid shifts and tenderness in the breasts." Normally ovulation occurs from the 12-16 th day after the first day of your last period. Free Website Builder: Build a Free Website or Online Store | Weebly Reasons why you feel pregnant after period. It can be caused by many reasons, the majority being of a hormonal nature. Sore Breast After the Period: Is It Normal? | Med-Health.net This article explains the reasons why you feel pregnant after your period. It gave me high hopes! Breasts Feel Heavy or Full - Countdown to pregnancy 7 Reasons Why Your Breast Size May Increase Suddenly images of montgomery tubercles in early pregnancy Menstrual Hormonal causes are related to your current stage of life or other natural processes. 4- … There are a few steps you can take to curb changes in your breasts during your monthly cycle: Eat a diet lower in fat, avoiding high-fat foods. In the days leading up to your period, your estrogen and progesterone levels can fluctuate dramatically. The nipples are also red and swollen and peaked - Answered by a verified Doctor. Causes . March 2011. in 1st Trimester. My Breasts