One thing comes to mind for me that might be helpful to you. Are you fit - in the sense of well-developed muscles and not a lot of useless body weight? Because in your job, it seems the muscles would be important. I have always had strength from weight lifting, but recently I took up swimming and the benefits to general musculature have been profound. So many things are less painful. Physio doesn't fix things in my experience, but building up the structure, the reserves, really prevents problems and helps fix them. Well, just my 2 cents. I'm not a jock or any kind of medical worker, just someone who has done a lot of physical work.