I'm 16+2 and not really showing yet (tiny bump that I can see and feel but that's it) but my back is killing me! Its a lower back ache-y feeling rather than sharp pain or anything, and gets worse when I sit down for anything more than 15-20 mins, and a short walk does relieve it. I sit at a desk all day at work and obviously I can get up and stretch my legs, but I cant have a 5 minute walk every 20 mins to make my back feel better, I wouldn't be doing any work! Is there anything else I can do to ease it?