LemonSys, the long journey to finding out the cause of our pain is discouraging. The second doc was right. Orthos look at bone and connective tissue. It's rare for them to look for something else. It took me years and multiple docs to get a diagnosis. The specialists I saw all focused on their own area. It took a GP who looked at all the test results to diagnose me.
Since the docs do not know the cause of your pain yet it's hard to say if it can be "fixed." Think of it in terms of a car that won't start. The mechanic (doc) needs to figure out why the car won't start to know if it can be fixed.