Your liver is processing toxins right now instead of making the dark green bile that causes the stool to become various shades of brown. This is not a bad thing....it just meeans that toxins are coming out.
The rumblings are just your body getting rid of the harmful things that hopefully have been causing your problems in the first place.
I have a note on my desk to call you and promise I will get to it later today. Hang in there!