Hi welcome to Health care magic forum. You are 68 years old and have spinal disc problem, It is a difficult to deal problem, but there is a way where there is a will. Your problem appears to be sciatica
arose due to disc problem. I advise you to be in continuous touch orthopedic surgeon to have an idea of progress or deteioration.
Besides i advise you some diet recomendations as take more of green leafy vegetables, pulses, sprouts, milk, meat, fruits and juices to build up blood and resistance.
Avoid taking potato, other tubers, tomato, coconut, cauliflower, egg, chicken, fish and sea foods for at least 6 months. Wishing for a quick recovery and thanks for calling.