Quoting Squeaky McGee:" Like everyone else said, it's Braxton Hicks contractions. I'm surprised you've never felt them before, being this isn't your first pregnancy. How often are you having them?"
Quoting Radame N Angela Robles:" No never felt this before.. but like they say every pregnancy is different, there still happening, its like every half hour, it last a couple minutes then stops."
Quoting Jen Nemo:" I never had braxton hicks either...Im on my 2nd pregnancy and my stomach gets tight with no pain every once n a while, but thats just the baby switching positions...."