Really liquid output can be from a number of causes, everything from a bug, to the barium smoothie they give you before a CT scan sometimes, to a slight blockage. Hard to tell sometimes; there are a lot of factors that can affect it. However, beware of taking what I call "fiber in a jar" or fiber supplements like Metamucil. While I understand many people take them with no problem, I have found that even a mild dose can cause near-crippling gas, cramps, and very soft/liquid output. And while I can eat beans and other natural food sources of fiber with no problem, they do need to be properly cooked - I used some split peas in a soup and did not cook them long enough, and ended up with severe gas.
I have also found that popcorn and some seeds swell up in my intestine and will not easily go through my stoma (although it may be that they won't let my stoma expand enough for them to go through the hole in my wafer). Everybody is different in what causes blockages, though. Good luck, and hope everything successfully passes eventually.
Oh, and a stomach bug is the worst. Especially when traveling. 11 pouches in a day and a half. Miserable. I certainly hope you haven't had that!