More often they came when I was being physical ie mopping the floor or shopping or at the end of the day when I was tired and trying to relax
Same for me. When I was still working (I'm a nurse) they would get gradually worse and worse the longer I'd been on my feet doing my nursey duties

They kind of feel like dull, brief period cramps for me now, and I have noticed they are getting gradually more uncomfortable as I get further along in the pregnancy.