does anyone else experience weird "plumbling" problems after a long ride?

I just did the MS150 ride and i'm kind of messed up when it comes to using the bathroom. I didn't change my eating habits during the ride except for eating a bit more for energy. This is the day after and my stomach isn't agreeing with the rest of me at all....

any ideas on what this could be? or do you experience this at all as well?