Skye- I would suss it out at your appointment on Thursday! I have Pelvic Instability which is apparently pretty much the same as SPD, and it sounds like it could be that! It could also just be normal pregnancy pain/ligament pain as bubs sitting on a nerve or something. Bubs should weigh about 2kilos now so understandable to experience some pain. They say pelvic instability/SPD only gets worse, but mine and another girl I know have found the opposite, it's gotten better towards the end, fingers crossed! Ket us know how you get on xxx