Welcome at HCM.
I have read your question completely.
It looks from your details that most probably you may be having prolapsed disc.The prolapsed disc looks to be compressing over the nerve supplying to lower limb.You should do following to have relief -
-Get x ray
done.The MRI will be best for you.
-Take strict bed rest
-Take a good analgesic
,on your doctor's prescription.
-Take the help of a good physical therapist.
-Consult to an orthopedic surgeon.
Hope this will help you.
With best wishes.