Since your posts, have you had the SI joint fused?
I'm in the same boat as you. Back in 2007 I was in Iraq and we came under another rocket attack. At that time, I was wearing my full body armor gear, helmet, ruck, etc. When I jumped into a ditch for cover, I was greeted with this IMMENSE shooting pain directly in my SI joint area. It was debilitated for two weeks, and ever since then I have had constant level 8 pain 24/7 with occasional level 10 pain every day.
After returning to the States I've had multiple CT scans and MRIs to which I have been diagnosed with three bulging discs, one herniated disc and one of the disc has an annular tear. From that, I have gone under a plethora of nerve ablations, PT, steroid injections, etc.
Now that I'm retired, I went and saw a civilian neurosurgeon. He referred me to have a CT scan with steroid injection for my SI joint. It has really helped and the only pain I'm feeling today is just from the needle injection. Ergo, I'm leaning towards having my SI joint fused. However, before this injury I used to be a marathon runner. I would LOVE to take up running again, but I'm not sure if the fusion will allow that.
Any information you, or anyone else, can provide will be immensely appreciated!!!