I have lower pain in my back and hip on the right side, so much so its difficult to walk at times. i don't know why?

Back vs hip: In an older person we worry about hip arthritis causing the pain in the hip and back. But in someone your age, the primary location is more likely the back, with muscle spasms mechanically affecting the hip. A course of physical therapy focused on the low back would likely help. If not, then an x-ray then MRI of the lumbar spine would better guide treatment.