Small tummy ache and heavy discharge could be pregnancy. Because the uterus slowly grows larger after pregnancy, pulling on the surrounding tissues and ligaments, some people may feel discomfort in the lower abdomen or a feeling of soreness in the lower abdomen after pregnancy. Vaginal secretions may also increase under the influence of estrogen and progesterone, which is a normal reaction to pregnancy. Reactions to pregnancy can vary, including nausea, vomiting, fatigue, a preference for acidic foods, a dislike of oily foods, and in some cases nipple tenderness and a deepening of the color of the nipple and areola. If you want to guide yourself whether you are pregnant or not as early as possible, you can go to the hospital to do a blood test to check the blood HCG, if the HCG index is elevated, it means that you are pregnant.