What Causes Severe Pain In The Back And Leg Despite Having A Surgery?

I hurt very badly in my right inside panty line and outside hip area and my lower back area. Sometimes the pain goes all the way down my leg. The pain is in different areas of my leg at different times. Sometimes my leg feels like it s going to be overtaken by Charlie horses. I have a very noticeable limp from this. I was sent to an orthopedic surgeon. After that visit, he is ordering another MRI. Yes I ve already had one, about 6-8 weeks ago, supposedly on my hip area. Now this last dr. found out I had a ruptured disc and surgery back in 2002, he is ordering another MRI for my back area also. I just don t understand why it is taking so long in figuring this out. I still work and will have to work for another 4 years and I HURT intensely, 24-7. Why is it taking so long for them to figure this out. I need relief from this painful situation and this problem fixed. I have too much to do in life and it s just me to take care of everything.