It is not unusual to have some residual symptoms in the involved leg for up to 3 months after the decompression surgery. It is unusual to have symptoms in the formally normal leg. I assume your neurological findings (numbness and weakness) have not increased since surgery. Ask your surgeon if taking an oral steroid could be helpful to reduce symptoms.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.