I noticed the other morning when I woke up... I had a Braxton Hicks contraction as soon as I sat up from a lying down position. Now I'm noticing I get them (a) after sitting up from reclining and (b) sitting down after walking around. It's not every time, but I definitely notice them. Anyone else had this? They're still sporadic - I timed them at 3:15, 3:27, 4:05 and 4:14 this afternoon - and they vary in intensity, but they're still a little close for my comfort.