Hi
I have a MP3 full of songs that I listen to when I'm down/sick with pain.
they include:
Dixie chicks- Loving Arms
Dixie chicks- With out you
Dixie chicks- So hard
John Williamson- Purple roses
John Williamson- Flower on the water
Missy Higgins Stuff and nonsence
Missy Higgins - The special 2
Sara Storer - Angel
Sara Storer - Firefly
Faith Hill - There you'll be

Just to name a few off the top of my head.
I listen to it quite often as I am in pain alot and the pain makes me feel down as it is a reminder of my M/C (that's when I got Asherman's Syndrome that causes the pain).

The song Tempus Moriend was talking about is - Tubthumping by Chumbawamba

Cheers
Chris