It is not uncommon for you to feel abdominal discomfort or pain throughout your pregnancy. In the first few weeks of pregnancy, your uterus is starting to grow and you may feel cramping similar to menstrual cramps. This sort of cramping is completely normal and is nothing to be concerned about.
You may experience occasional abdominal pain throughout pregnancy due to other harmless causes, including gas, bloating, constipation and Braxton-Hicks contractions.
Persistent or severe abdominal pain is never normal. If you experience prolonged or severe pain at any time during your pregnancy, you should contact your physician immediately. This sort of pain can be a sign of ectopic pregnancy, miscarriage, preterm labor, placental abruption, preeclampsia, urinary tract infection, stomach virus, food poisoning, appendicitis, kidney stones, hepatitis, gallstones or bowel obstruction.