Yes I had this when I was pregnant with DD. I use to swim 4 days a week before I was pregnant with her, so I was a bit dissapointed when it was so uncomfortable for me to swim with a belly. I gave it up because I just wasn't enjoying it. Mine was around the 17/18wk mark. My obs also advised me to stop it if it made me too sore.

Maybe Aqua aerobics would cause less soreness.......