My Pelvic Girdle Is Slanted Down On My Right Side,

My pelvic girdle is slanted down on my right side, causing my right leg to be unnaturally longer than it should be. This creates radical pain with no let up. I also have osteoporosis and severe advanced osteoarthritis. Is bed rest good or bad? What pain medication should I ask my doctor for? Would a lift under my normal leg help?