Stomach Tightening

It's braxton hicks and it's very common especially now that you're in the last stage of pregnancy. Comes & goes just for a few seconds and will go away when you change your position and should not be painful. Your uterus is preparing for labour and take note that now you're considered as full term already. If it's painful then it's contractions. Pain normally comes from your back to your tummy & you'll feel a very heavy pressure down there then start timing the frequency. Head down to the hospital if it frequents from 5-10 mins. No need to wait until 2 mins.