29weeks preg, Period Cramp, and mild twinges?

If your stomach gets hard during your "cramps" then they might be either Braxton-Hicks or mild contractions. You're going to want to start timing them. Drink a full two gles of water, lie down if you can and see how many you have in an hour. If it's more than 6, call your OB immediately because it could be preterm labor.