Answer: when baby is conceived our body goes through various changes. these changes give pain, bulging body and all. As your uterus grows, it displaces your bowel, Eat more frequent, smaller meals, exercise regularly, get rest, and empty your bladder often.
Sometimes as the uterus expand, it stretches the round ligaments--two big ligaments that travel off the front of the uterus and down into the groin.
Constipation and gas are, unfortunately, often part of pregnancy. these are main reasons of stomach pain.