Some possible alternative care ideas that you might want to look in to.
I don't know if you have explored any of these yet or not.. and I can't say positively if they will help any of your conditions or not.
Magnets/ near/far infrared/ low level laser
Hypnosis/meditation/EFT -types
acupuncture /acupressure
traction? for the spine?
What is the most bothersome- the back pain?
I hope you have a good quality mattress and plenty of pillows to help support and change positions when spending much time in bed.
Pete Egoscue {lib books & website} has some simple positions that might help -
http://www.egoscue.com/ his site isn't loading right now but here's another with some inf-
http://www.shareguide.com/Egoscue.html