Hi there,
I have had IBS a few years and that happens to me at times ... in fact, right now my tum is geeeeeeeerrrrrrrowling and just won't shut up!
One thing I also find is that, during times of severe anxiety, my bowels literally turn to water in no time at all! I think that this might be what you're experiencing, so maybe it might be a good idea to chat to your Dr about anxiety, but also go through your symptoms as it is a good idea to rule out other illnesses. I went thru all sorts of tests, and my gastroenterologist told me that IBS is a diagnosis of exclusion.
Good luck!!
Tam