hi, Thank you for providing the brief history of you. since you have tried all things and now the neuralgia pain is only in the lower limbs than you should start focussing on exercises of the core. May be the exercises you did till date was not specific or didn t turn to stabilize the spine. you have tried stretching, walking, pool exercises etc. since this have not work well you are getting more of the frustration. I will recommend you to meet a physical therapist and take some therapeutic ultrasound therapy along with it TENS therapy which will help to am extent. Also there needs to be a focused plan of rehabilitation by the physical therapist to break the pain pattern reception by the brain which can be done by modifying exercises at regular intervals with use of TENS therapy. As the medicine are symptomatic, and work only on the symptoms to an extent. but to increase the efficiency of the medicines you need to improve you metabolism. as based on the individual the metabolism varies alot. So your body has to produce the natural medicine to reduce the pain. I have myself seen many patients with neuralgia and I have faced a good number of question and much more. But the rehabilitation plan was made with a great effort which suits patient to patient. also to mention, that once they pain turns into chronic the pain barrier has to be broken , until the pain barrier breaks it is tough to think further. for which I will recommend you to visit a physical therapist and take his opinion of helping you. also do regular breathing exercises and meditation as well. breathing exercises increases the blood carrying capacity of blood tissue and improves metabolism of the tissues and the body as a whole. meditation helps to control the mind and anytime when the brain is calm it takes a better decision and focus harder to any form of treatment and take best outcome. with the grace of God I wish you a good health.