Hello Doctor, I Am 65+, Male, Have Back Pain For

Hello Doctor, I am 65+, male, have back pain for many years.. intitially tried physio therapy, excercies, etc .. some remedy, but not relief. Now-a-days, night time pain is high, have to cramp up in bed, diffcult time to get to sleep. If there is a sleep break the pain again causes severe cramps. Also, added are pain in elbow joints .. Occassionaly take combiflam ..
X-rays do not show any slip disc or other abnormalities .. Daytime movemement is ok.
Any advice to reduce pain ??