Hi Kat,
I find with fibro you really need to learn to pace yourself! and you'll find as your tummy gets larger, that it's a big help.
I went thru a flare about a week ago. Oh gosh, my hips/pelvis/butt all hurt, and it felt like baby weight about 20lbs, sitting on my bladder. lol
Thankfully, it was just a flare and I'm doing better now. But I find I am lying down a lot more often, taking weight off all that area. It helps a lot. I can't stand for long, so thankfully I don't have to work. So I take house hold chores slowely too, and distribute them thruout the day/week.