In reply to leeangell: bad back run in our family , My daughter has been worst , having two operations as a teenager. I ave problems too, but at home I sometimes wear a weight lifters type belt, but softer and more elastic.
When I have a heavy rucksack, I buy one with a very robust and padded waist belt, I pull it VERY tight onto my hips and make sure the straps on my shoulders are loose, and just stop it moving backwards, but not putting any weight on my back, all the weight of the sack is then transferred straight to my hips and legs , avoiding loading my back. Like you , the pain Is always there though, this only stops it getting worse, it does not make it better.