I'm 5 weeks in and wondering how much exercise is allowed. I want to do a little something a few days a week. Is anyone doing pregnancy exercises like special Yoga, Pilates, or just taking walks? I'm not trying to break a heavy sweat,just trying to keep good blood flow to help with muscle cramps. I have a video of 15 minute aerobics workouts (abs, ***, thighs, and arms). Would it be ok to choose one of these at a time to do few times a week?