Damn Back

I don't know what I've done but since yesterday I have been in agony with my back again.

I noticed it first on the bus yesterday morning when I suddenly felt it go and all of yesterday it was really painful.  I can't walk properly (looks like I have pooed myself) and getting up from a chair is really hard.

This morning it's just as bad and is really starting to get on my nerves.

It's happened before and I know that it will suddenly get better on it's own but right now it's very annoying.