I have been working from home for my job since my first pregnancy. I was sitting at our table, working at my laptop and I've been feeling like a on and off tightness in the lower part of my belly. I feel the tightening maybe once or twice an hour. It's not necessarily painful...just uncomfortable. Is this normal? Could this be Braxton Hicks kicking in? I had it in my last pregnancy, but I didn't start feeling them until around 28-29 weeks in. If it helps, I'm 23 weeks in and I'm carrying twins. Thanks.