Just to add my two cents worth to what's on the forum. Due to insurance requirements, I had to go through my GP for treatment. I've had some back problems since I was 17 that stopped me from playing competitive tennis but didn't give me any problems until I was in my 40s. Started doing core exercise and that helped. Was rear ended about six years ago; knew something wasn't right but didn't show on x-rays. Slowly getting worse over the last few years. I've seen two different physical therapists that said they could take care of the problem only to make it worse. So now I'll go to my last resort and see my sister in law in Las Vegas who has helped me over the years and is the best therapist I've ever seen. I do know that until you unstick the SI joint (left in my case, there is an inch difference between the top of my left and right kneecaps), nothing is going to get any better. Once you can establish motion in the joint, then a strong exercise program targeted at the core section is required to keep the joint in place. Unfortunately, this requires a PT who is not only very good at what they do but also understands the exercise needed. From what I can tell, a lot of PTs out there are only trained to give you exercises and maybe massage. I wish you lots of luck.