Thanks for posting your query.
With the available described symptoms, there appears to be possibility of prolapse slipped disc
along with radicular pain
radiating to lower limb.
You should consult with internal medicine specialist/ neurologist
and should go for thorough neurological check up.
You should also go for peripheral arteries
lavatory examinations to rule out chances of vascular pathology.
You should go for x ray lumbo-sacral spine on preliminary basis.
You should also go for CT/ MRI scanning of affected spine area.
You should also go for analgesic along with muscle relaxant
for relief of your symptoms.
Spasm in muscles is a protective mechanism to prevent further injury.
Dr. Mayank Bhargava