I sympathise also as a fellow sufferer.
I have had pain from the age of 15 after a sports injury and my problem is disk related.
I am now 36 and things at the moment are fine. I still have to look after my back and get the occasional twinge but it's much better than it was and it's one of those things which will never be perfect.
Things reached a peak a few years ago after instructing in 152's. I could barely walk after a 1 hour lesson.
However I have stopped playing squash and badminton and now play golf which seems ok on my back.
I used to fly the Dornier 328 which has very hard seats. In fact many pilots brought cushions in to work with them! The hard seats did not help. But the aircraft I now fly is much kinder.
The biggest help to my back was visiting an ostiopath once a month to keep everything supple.
I don't know how tall you are but it may be worth considering your car driving position, or maybe investing in an automatic if you drive a lot of miles.
Good luck