Fibromyalgia Support Group
You're not alone in your pain. Fibromyalgia is a condition that can be difficult to diagnose and manage. If you're trying to cope with pain throughout your body, sleep problems, general fatigue, or other common fibromyalgia symptoms, you're in the right place. The community is here for you to talk about therapies and share your challenges.
I had years of SI issues that the chiro swore she was helping---but it didn't STOP till (alas) --- PT. Ask a doc for PT referral and work on abs, glutes, IT band, anything involving the hips, pelvis or lower back. Stability is a huge help. I found that also working on pelvic wall exercises (yes, Kegels and so on) helped too.
Good luck!