Pelvis, hip and lower back pain?

Im 19 weeks pregnant and sense 11 week i have been dealing with sacroiliac joint pain. My dr said my hips are out of position and my ligaments are inflamed. Well it has become worse over the last 2 months and the pain is now in both hips, in my groin, in my lower abdomen and my thighs ache (as well as in both sacroiliac joints). I cant get in and out of chairs, the car or bed without being in so much pain im in tears. Lifting my 6 month old is torture!. I have tried chiropractic, physio, SI belts, hot/cold packs, codeine, paracetamol, resting, massage nothing is working at all and it just seems to be getting worse and worse. Has anyone else been through pelvic pain to this extent and if so what helped apart form obviously childbirth? I have been offered cortisone injections but i really want to do that as a last resort.