I got lots of braxton hicks when we were moving house, I was 6 months with Elijah and it was such a stressful time! As soon as we were settled into the new house, they stopped and never came back. Maybe look up irritable uterus? Are you drinking plenty of water? This is quite normal to have braxton hicks though, unless they of course intensify, bleeding is accompanied with it etc - the best thing you can do is try your best to ignore them and play them down... but of course always mention to your caregiver. I never had any BH with Marisa, so it was worrying for me too.