Bugger about the kidneys, sorry to hear that. I too have another condition (squished disc) which compounds the SPD fun isn't it! Stairs can be just as bad as walking, so keep that in mind for walking too. If you do alot of driving etc, it might be an idea to invest in a disabled parking sticker? Talk to your Dr and see what he/she can do as I know in most cases we are eligable (I keep meaning to do it but forget). The plastic bag thing is a great idea!

Goodluck sweetie, hopefully it will ease up on you with help from your chiro.

*Hugs*
Cailin