Thank you for your question. Although without being able to examine you I can not offer you the specific advice on diagnosis and treatment that you need, but I would try to provide you some relevant information about your health concern.
Sciatica is a set of symptoms including pain that may be due to compression or irritation of the sciatic nerve, which may occur due to disc hernia, disc degeneration or spondylolithesis. So, the treatment modalities also range from anti-inflammatory, physiotherapy, non-surgical decompression or surgical decompression. But, surgical modalities may have 50% chances of relapse of pain. Before opting for surgical procedures, you should evaluate both the pros and cons. Hope this helps.
You might be a candidate for a surgical procedure called a laminectomy. You require a lumbar MRI to get a handle on the problem.