SI joint pain
I had the bad fortune of sleeping on a terrible mattress lately, and it through my hips out. So, I ended up with SI joint pain and had the "opportunity" to figure out what I needed to do to ease it.
While the SI joint was definitely out of alignment, I found that it was actually being caused by the very top of my quadriceps muscles, on both legs, and I needed to so the stretch to rotate my pelvis back. It's still a bit sore, but it's so much better that I wanted to remind people to not just look at the site of pain, but to consider the muscles that are the potential source of the pain.
You are always welcome to come onto my forum (http://www.julstro.com) and let me know what you are experiencing. I'll be happy to help you figure out what muscles need to be treated and stretched. Most of the time it's successful, even if it does sometimes take a few days of self-treatment to get it to work out completely.
Wishing you well,
Julie