Chiropractors can definately help certain situations, especially if it involves alignment issues. The treatments for alignment can be painful initially, but will eventually help the problem. I have been there, along with one of my past trim carp. foremen. Mine was more a result from sitting on a fat wallet for too many years. His was more complicated. Eventually we both got a lot better. There are a number of Yoga back excersises that helped me gain strength & tone in the muscle groups that support the spine. I highly recomend them. Most are as simple as laying flat on your belly, hands at your hips, & doing various leg lifts, & moving legs side to side. They will tone, the back mucles, & help with vertabrae alignment.
Herniated disks are a different problem. They are way more compicated to fix, & usually need rest to heal at a minimum.
About three years ago, we switched to a "Sleep Number" air matress bed. It took me about a month to get used to it, & then it was great. It had been a long time since I had slept through the night, & now it's pretty common. My back has been reasonable for about the last 10 years or so, but I am very carefull about what I try to do.
Best of luck,
Joe