I Have Pain In My Left Lower Abdominal Region Which

I have pain in my left lower abdominal region which is dull and pain in my buttocks, and pain that runs down my leg. The region is almost my groin area. Exercise, sitting in bleachers, and driving makes it worse.
I am wondering if it referred pain from my back. I have had surgery on my lower back for herniated discs almost 20 years. ago.