It's one thing to seek an opinion on something and another thing entirely to try and fit a diagnosis. You're setting yourself up for a lot of misdirection if you post things like this on a forum.
There is simply no substitute for a doctor's examination.
From what you write, all sounds normal. Poo is meant to be smelly and messy. Diahorrea is profuse and watery and its appearance quite distinctive. Of the other ailments that have been named, there are clear symptoms apart from bowel movements that are apparent.
This demonstrates that, again, before searching for a diagnosis, see your doctor first.