In February I had surgery for a herniated disc in L5/S1 that was causing my foot to be numb and pain down my right leg. Since the surgery things have been better but I have a horrible time sleeping at night. After about 5 hours I start having pain in my back near where the surgery took place. This makes me feel exhausted all the time. My doctor said this was normal and did not give me any advise or medicine. Any tips on what can be done to help: medicine, the way I sleep, etc?