Thanks, RaisinOak! Yes, the pain and discomfort is totally worth it.
I did not have IBS-like symptoms -- that I know of. My odor was musty and yeasty, not really fecal like. Is that what you suffer from?
It could be from an infection in your nose that only you can smell - do you know that others around you can detect the odor? I only ask becuase that happened to a family member of mine - he thought everyone had to smell it, but turns out it was only he who could. That's a mean trick of nature!