Welcome at HCM.
I have read your question.
It looks from your details that you are having prolapsed disc at level L4-5.The prolapsed disc (if moderate to severe) may lead to pressure over the exiting nerve root
,this may lead to weaknes in affected muscles & numbness
or abnormal sensation in affected part of limb.In your case you may have problem at outer aspect of your leg & foot.
You should do following to have relief in this-
-At least have MRI
of back to rule out severity of the problem.
-Avoid bending at your back.
-Take the help of a good physical therapist,he may provide you relief with help of ultrasonic therapy
,infra red application,etc.
-Consult to your doctor specially an orthopedic surgeon.He may look at your MRI & DEPENDING UPON YOUR CONDITION MAY ADVICE YOU SURGERY OR CONSERVATIVE TREATMENT.
-Take a good nerve analgesic
on prescription from your doctor.
Hope this all will help you.
With best wishes.