back lower left side. not very painful. just uncomfortable - a little like its bloated back there. In addition there is a small pain when you push on the left side but not on the right that does seem mussel related. In addition i have a small cramp like pain in upper left shoulder. in general very week, and shakey.

then again, i could well be over reacting..... i've just not done a zero carb before and this feeling seems to coincide with starting.