I did for a while. As an outside sales guy I carried a heavy bag. It knocked me outta whack. My regular Dr. couldn't help, suggested rest and stretching. My chiropractor, on the other hand, ROCKED! She had me whipped into shape in about 30 minutes. One side of my lower back was over-compensating for the other due to the heavy bag.
I did the stretches and upgraded to a back pack. Did wonders. Now I'm pain free 99% of the time. If it starts to feel tight I go back in to the Chiro. Don't lose hope. ...and yes, back pain sucks it.
oh yeah and I was also carryin' way too much weight on the mid-section. Getting rid of that helped a lot too.