Braxton Hicks contractions usually start around the 6th month of pregnancy. So, it is entirely possible this is what you are feeling. They aren't particularly painful per se. It is just a tightening of the stomache muscles and feels like it creeps from your sides to the middle of your stomache. This is kind of how your beginning contractions will feel when you start early labor. Only they will get more intense and more regular when that time comes.
at 1:24 AM on Dec. 4, 2010