D.G.
I have issues with my sacrum, but mine come about much further in pregnancy, around week 30 or so. I had a c section with my DD because she got stuck in my pelvis during delivery and in my surgical notes it states that I have a very flat sacrum. Not sure if that has anything to do with my pain or not. I attribute my pain to malpositioning of the baby. Mine has been hanging out posterior on the right side, and that is the side of my pain. There is something I read about called the buckled sacrum manuver where you stand with your hands resting on the wall, feet shouler length apart and someone runs the heel of their palm down your spine and where their hand gets resistance they appply pressure until they can continue down the spine. Its a midwifery trick used in labor. (Check out spinningbabies.com) I have read about using a maternity belt also, but being that your pain began so early I am not sure if this would help. I have read a lot of advice on forums saying that a webster trained chrio is a must, but I have not attempted that. I do personally believe that I have an alignment problem, one of my legs is very slightly longer than the other, not sure if its genetic or if I am just all out of wack in my pelvis. I am sorry I could not be more help, but I thought I would respond anyway. Good luck.