Hi, Thank you very much for your question; although it is quite hard for me to give you a precise opinion here without being able to examine you, but I would try to provide you some relevant information about your health concern. In slipped disc or disc prolapse conditions symptoms may originate due to nerve root pressure, pressure on the spinal cord and pressure on the tail bone. Common symptoms could be paralysis of muscles, pain radiating to the arms or legs, leg pain and numbness, tingling, or weakness. Warning symptoms can include loss of control of the bladder function, paralysis & spasticity of both the legs. Since you are suffering continuous weakness and notice reduced strength of muscle bulk in left leg, please arrange an appointment with a neurologist right away. Further referral to a physiotherapist for spinal exercises could be beneficial and may produce relief of symptoms. Hope this helps. Take Care & Stay Healthy!!!
Do you have a good idea if this pain is neuro or ortho in origin? Facet arthritis of the lumbar spine can cause this type of pain but so can other things. If it is a chronic and/or non-correctable condition, someone needs to refer you to a pain specialist who can prescribe a variety of pain relief modalities.