11 weeks pregnant stomach tight, some pregnant women because of tired or cold stomach tight, hard, or with a little drop feeling and waist pain and other symptoms, but also pregnant women because of the embryo development is not good, the possibility of miscarriage and lead to the symptoms. 1. Cold or tired: such pregnant women usually not only tightness of the stomach, often around the navel or the upper abdomen at the same time tightness, swelling and pain and other symptoms. This can be relieved by drinking more hot water, keeping warm and resting. 2. Miscarriage: some pregnant women 11 weeks pregnant stomach tight because of the possibility of miscarriage, especially with vaginal bleeding pregnant women, more alert to the current is embryonic arrest, difficult to avoid miscarriage and other conditions, need to do ultrasound as soon as possible to see the development of the embryo. During pregnancy, you should go for regular checkups and seek early medical attention if you feel unwell.