I think I may have a mild form of this- had shooting sharp pains in my lowere back, moving from side to side since about 8 weeks, & the midwife reckoned sciatica for that. I am now 35 weeks, & for about the last 5 weeks, I feel like my pelvis is going to split, & my hips are very sore. The pain is excrutiating somedays, & much more manageable the next. I feel loads better when I kep mobile, but sleeping is difficult, because turning over in bed, & getting up for a wee is so painful! Midwife sort of fobbed me off though, recommended I try yoga before going down the physio route.