I have had terrible lower back pain for the last few years. Recently, I have gnawing pain in my hips, lower back, and leg at night. I am loosing lots of sleep because of this. At times, I have burning pain that feels like its right inside my right pelvis, nearer to the groin area. My doctor told me to take pilates to work on my weak core, which I have done for the last 4 months - with very little reprieve. Any advice? Who do I go to to remedy this pain?