I tend to wreck my body in bed, or getting out of it. No kidding. Would I were having fun each time that happened.
But - the first time I was missing seeing a curb and jolted down; have done that several times since due to peripheral vision matters. So, whenever I get back pain, it is always in that same place - and I seem to do it simply getting out of bed. I remember one time watering my rather large yard standing at an approximate 90 degree angle.
Yes, yes, I know, exercises. The one that makes most sense to me is that we shouldn't just sit at a computer stolid for hours. At the least, move the spine forward and back - upright not being the best position as is assumed, key being flexibility. I once had a link on this, but it whooshed into a computer crash. Also, there is much advice out there that we stand to work at computers. And I think Roger had a particular kind of chair/stool he thought was good.
I swear I sprained my thumb recently reading a thick book in bed..
oh, never mind.
On serious back injuries though, there are many pros and cons, mostly adamant. So far so good in my experience, perhaps not so serious, to keep moving. On the other hand, my cousin's son had major scaryshit back surgery and what I remember about it was that he shouldn't have moved.
But that doesn't sound like Dag's situation, per description. I'll bet dollars to donuts, Dag, you are in much better physical shape than the majority of us, re muscle support.
Anyway, yeh, see the doctor.