Hi Guy, welcome to the site, and to answer your first question is whether or not you are still in a position when you first started feeling this way, or if you have been able to alleviate any of these problems and there are several ways to be able to do this.
We know what it's like to push a wheelbarrow full of concrete uphill, especially Mt. Everest.
Secondly, everyone's experience is always so helpful to those who are struggling with similar or close to the same as what you have had to go through, and we feel sorry for what you've had to suffer from, but your own experience and knowledge would be very helpful.
Another shoulder is always lovely to have and thank you.