Have Not Been Able To Walk For More Than 2-5

Have not been able to walk for more than 2-5 minutes continuously since February 2016 without the right leg area hurting. X-ray in hip area showed no problems, went to 10 pt sessions, then to orthopedic clinic with spine X-ray and MRI. L4-L5 seem to be the problem. Did an epidural--didn't work and shots on both sides of l4-l5. None if these procedures worked. Just recently began having groin pain on left leg. Any idea as to what I should do next?