hi gabbycakes...I would suggest possibly you may also have SI joint injury(sacroiliac joint). They are common after a fall or auto collision. I have this issue, and it causes alot of pain/weakness. These are the small joints in the pelvis that connect to the sacrum/lumbar spine. Sometimes it is the piriformis muscle that also gets inflammed and presses on the sciatic nerve that causes the awful shooting leg pains...

take care, hope this may help.