I'm on fortnightly treatments with my Chiro, I have been for the last few months, might be stepping it up to weekly from now until the birth. I want everything as good as it can be in there for birthing I'm working extra hard on sitting straight, not slightly twisted to one side (a bad habit of mine forever) Yoga ball is now my computer chair too. This is the first of my 4 pgs where I've had the pelvic pain. But I suspect it comes from my last pg where I damaged my groin and misaligned my pelvis quite badly from excessive vomiting when I was sick with HG. My Chiro fixed it then, and we kept it good through out the pregnancy, but this time I'm not doing so well. I had also stopped work by now which made a difference I think...only 2 weeks more until mat leave