I Have Been Suffering With A Severe Jabbing Pain In

I have been suffering with a severe jabbing pain in my pelvis, right hip and buttock for the past month. The chiropractor has diagnosed it as sacroiliac joint pain, but after 4 treatments, it just hasn't helped. What is the cause and what else can I do to get over this. I can't lift my right leg without that sharp pain, so I need to walk with a walker. It's I possible to do steps and getting in or out of a vehicle is also painful.