I wish I could remember who told me this, but I have heard it before from another mom. Have you considered a chiropractor? Every time I stood up my hip would hurt so bad and send a shooting pain through my leg and back. Finally, after a while, I went to a chiropractor who said my hips were not perfectly aligned or something I forget exactly what...but he had me lay on my side, dis an adjustment and put my hips back!! I haven't hurt since and that was a few kids ago. Can't hurt, might help.
Yikes though. You have been going through this for a long time.