A doctor will order scans of the area to see if there's anything obvious requiring surgery, otherwise a physio or similar should be able to provide you some exercises to strengthen the body. You could probably just take yoga, pilates or calisthenics classes as long as you don't exacerbate things.
You don't mention doing any exercise.
Moby - long ambients.
Nine inch nails - ghosts.
Aphex Twin - Selected Ambient works 85-92.
There's a whole genre called dark ambient.