Don't be too concerned if you're Rh negative. Remember that dozen or so vials of blood your doctor took at your first prenatal appointment? If routine tests revealed that your blood is Rh negative, you'll require a shot of Rh immunoglobin at 28 weeks. This injection will keep your Rh negative blood from developing antibodies that could attack your baby's (likely) Rh positive blood. Not too long ago, this was pretty serious business, and it still is if it's not monitored. Luckily, regular testing and monitoring of these situations make it much easier for Rh negative mothers to go through pregnancy without a hitch.
By now, you may have already experienced the annoying phenomenon that is Braxton Hicks contractions. Although they occur as early as the sixth week of pregnancy, most women don't start to feel them until at least the midway point. Although they can be uncomfortable, Braxton Hicks contractions differentiate from the labor-inducing variety because they aren't extremely painful and don't get longer or increase in frequency. In fact, I had no idea that I was even experiencing them with my second child because the sensation felt more like he was doing a very intense headstand. To ease these occurrences, drink plenty of water to fight off dehydration and change positions or activities. More intense contractions can be a warning of preterm labor; always seek your doctor's counsel if anything feels unusual or painful.